Statewide opinion polling for the 2016 Democratic Party presidential primaries

This article contains opinion polling by U.S. state for the 2016 Democratic Party presidential primaries. For currency and accuracy, please note the specific dates for each polling as listed below. For the significance of the earliest state votes, the Iowa caucuses and the New Hampshire primary, see United States presidential primary – Iowa and New Hampshire. To know when any given state votes, see the timeline of primaries and caucuses.

Note: A statistical tie occurs when two data points from within a set are within twice the margin of error of each other. When adding polls remember to double the margin of error provided to see the true result.
This map shows which candidate is leading in the most recent opinion polling for each state.
Key:
  Hillary Clinton
20 states
  Bernie Sanders
3 states
  Shared states (statistically tied)
20 states
  No polling data in the three months preceding the state's primary
7 states, 1 district/territory

Note: This map reflects the latest opinion polling results, NOT the final actual result of the primaries/caucuses themselves. A map of the primaries' results is located at File:Democratic Party presidential primaries results, 2016.svg.

Statewide polling

Alabama

Delegate count: 53 Pledged, 7 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd Other
Primary results March 1, 2016 Hillary Clinton
77.8%
Bernie Sanders
19.2%
Other
3.0%
Monmouth[1]

Margin of error: ± 5.8%
Sample size: 300

February 25–28,
2016
Hillary Clinton
71%
Bernie Sanders
23%
Others / Undecided
6%
Public Policy Polling[2]

Margin of error: ± 4.4
Sample size: 500

February 14–16,
2016
Hillary Clinton
59%
Bernie Sanders
31%
News-5/Strategy Research[3]

Margin of error: ± 2 percent
Sample size: 3,500

August 11, 2015 Hillary Clinton
78%
Bernie Sanders 10%

Alaska

Delegate count: 16 Pledged, 4 Unpledged

Winner
Bernie Sanders
Caucus date
March 26, 2016
Poll source Date 1st 2nd Other
Caucus results March 29, 2016 Bernie Sanders
79.6%
Hillary Clinton
20.2%
Other
0.2%
Alaska Dispatch News/Ivan Moore Research[4]

Margin of error: ± ~3.8%
Sample size: 651

Published January 23, 2016[4] Bernie Sanders
48%
Hillary Clinton
34%
Martin O'Malley 6%
Undecided 14%

Arizona

Delegate count: 75 Pledged, 10 Unpledged

Winner
Hillary Clinton
Primary date
March 22, 2016
Poll source Date 1st 2nd Other
Official Primary results March 22, 2016 Hillary Clinton
56.3%
Bernie Sanders
41.4%
Others
2.3%
Merrill Poll[5]

Margin of error: ± 5.4%
Sample size: 300

March 7-11, 2016 Hillary Clinton
50%
Bernie Sanders
24%
Others / Undecided
26%
MBQF Consulting and Marson Media[6]

Margin of error: ± 3.6%
Sample size: 739

Published February 29, 2016 Hillary Clinton
56%
Bernie Sanders
22%
Others / Undecided
22%
Behavior Research Center[7]

Margin of error: ± 7.3%
Sample size: 186

October 24 – November 5, 2015 Hillary Clinton
47%
Bernie Sanders
19%
Martin O'Malley 2%
Uncommitted 32%
One America News[8]

Margin of error: ± 4.7%
Sample size: 427

Published August 17, 2015 Hillary Clinton
56%
Bernie Sanders
34%
Joe Biden 6%
Lincoln Chafee 2%
Jim Webb 1%
Martin O'Malley 1%
Public Policy Polling [9]

Margin of error: ± 6%
Sample size: 268

May 1–3, 2015 Hillary Clinton
58%
Bernie Sanders
16%
Lincoln Chafee 5%
Jim Webb 5%
Martin O'Malley 4%
Not sure 12%

Arkansas

Delegate count: 32 Pledged, 5 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd Other
Primary results March 1, 2016 Hillary Clinton
66.1%
Bernie Sanders
30.0%
Others
4.0%
Public Policy Polling[10]

Margin of error: ± 4.3
Sample size: 525

February 14–16, 2016 Hillary Clinton
57%
Bernie Sanders
32%
Talk Business/Hendrix[11]

Margin of error: ± 3.3% Sample size: 451

February 4, 2016 Hillary Clinton
57%
Bernie Sanders
25%
Don't Know 18%
Suffolk University[12]

Margin of error: ± ?
Sample size: 209

September 20–23, 2014 Hillary Clinton
71%
Joe Biden
8%
Andrew Cuomo 5%
Elizabeth Warren 3%
Martin O’Malley 2%
Undecided/Refused 10%
Polling Company/WomenTrend[13]

Margin of error: ± ?
Sample size: ?

August 6–7, 2013 Hillary Clinton
59%
Joe Biden
14%
Others/Undecided 27%

California

Delegate count: 475 Pledged, 71 Unpledged

Winner
Hillary Clinton
Primary date
June 7, 2016
Poll source Date 1st 2nd Other
California Secretary of State Primary results June 7, 2016 Hillary Clinton
53.1%
Bernie Sanders
46.0%
Others
0.9%
CBS News/YouGov[14]

Margin of error: ±5.0%
Sample size: 674

May 31-June 3, 2016 Hillary Clinton
49%
Bernie Sanders
47%
Others / Undecided 4%
American Research Group[15]

Margin of error: ± 5%
Sample size: 400

May 31 –
June 2, 2016
Hillary Clinton
48%
Bernie Sanders
47%
Others / Undecided
5%
NBC/WSJ/Marist[16]

Margin of error: ±4.2%
Sample size: 557

May 29-31, 2016 Hillary Clinton
49%
Bernie Sanders
47%
Others / Undecided 4%
Field[17]

Margin of error: ±4.1%
Sample size: 571

May 26-31, 2016 Hillary Clinton
45%
Bernie Sanders
43%
Others / Undecided 12%
USC Dornsife/Los Angeles Times[18]

Margin of error: ± 2.9%
Sample size: 1,500

May 19-31, 2016 Hillary Clinton
49%
Bernie Sanders
39%
Others / Undecided
13%
SurveyUSA[19]

Margin of error: ±%
Sample size: 803

May 19-22, 2016 Hillary Clinton
57%
Bernie Sanders
39%
Undecided 4%
PPIC[20]

Margin of error: ±5.7%
Sample size: 552

May 13-22, 2016 Hillary Clinton
46%
Bernie Sanders
44%
Undecided 10%
Hoover Institution State Poll[21]

Margin of error: ±3.47%
Sample size: 1,700

May 4-16, 2016 Hillary Clinton
51%
Bernie Sanders
38%
Others / Undecided
11%
Sextant (D)/Capitol Weekly[22]

Margin of error: ±2.3%
Sample size: 1,617

April 28-May 1, 2016 Hillary Clinton
49%
Bernie Sanders
39%
Others / Undecided
12%
SurveyUSA/KABC/SCNG[23]

Margin of error: ± %
Sample size: 826

April 27-30, 2016 Hillary Clinton
57%
Bernie Sanders
38%
Others / Undecided
6%
FOX News[24]

Margin of error: ± 4%
Sample size: 623

April 18-21, 2016 Hillary Clinton
48%
Bernie Sanders
46%
Others / Undecided
6%
CBS News/YouGov[25]

Margin of error: ± 4.5%
Sample size: 1,124

April 13-15, 2016 Hillary Clinton
52%
Bernie Sanders
40%
Others / Undecided
8%
Gravis Marketing[26]

Margin of error: ± 3.4%
Sample size: 846

April 7-10, 2016 Hillary Clinton
47%
Bernie Sanders
41%
Others / Undecided
12%
Field[27]

Margin of error: ± 4.0%
Sample size: 584

March 24 - April 4, 2016 Hillary Clinton
47%
Bernie Sanders
41%
Others / Undecided
12%
SurveyUSA[28]

Margin of error: ± 3.6%
Sample size: 767

March 30 - April 3, 2016 Hillary Clinton
53%
Bernie Sanders
39%
Others / Undecided
8%
USC Dornsife/Los Angeles Times[29]

Margin of error: ± 3.7%
Sample size: 832

March 16-23, 2016 Hillary Clinton
47%
Bernie Sanders
36%
Others / Undecided
17%
PPIC[30]

Margin of error: ± 6.2%
Sample size: 529

March 6-15, 2016 Hillary Clinton
48%
Bernie Sanders
41%
Others / Undecided
11%
Field Poll[31]

Margin of error: ± 5.6%
Sample Size: 329

January 6, 2016 Hillary Clinton
46%
Bernie Sanders
35%
Martin O'Malley 1%
Undecided 18%
Polls in 2015
Poll source Date 1st 2nd Other
Field Poll[32]

Margin of error: ± 5.0%
Sample size: 391

September 17 – October 4, 2015 Hillary Clinton
47%
Bernie Sanders
35%
Martin O'Malley 1%
Jim Webb 1%
Lincoln Chafee 0%
Other 2%
Undecided 14%
Hillary Clinton
40%
Bernie Sanders
31%
Joe Biden 15%
Martin O'Malley 1%
Lincoln Chafee 0%
Jim Webb 1%
Other 2%
Undecided 12%
USC/LA Times[33]

Margin of error: ± 3.6%
Sample size: ?

August 29 – September 8, 2015 Hillary Clinton
42%
Bernie Sanders
26%
Other/NA 16%
Undecided 16%
Hillary Clinton
39%
Bernie Sanders
23%
Joe Biden 11%
Other/NA 11%
Undecided 16%
Field Poll[34]

Margin of error: ± 7.0%
Sample size: 356

April 23 – May 16, 2015 Hillary Clinton
53%
Elizabeth Warren
13%
Joe Biden 6%
Bernie Sanders 5%
Jim Webb 1%
Martin O'Malley 0%
Lincoln Chafee 0%
Undecided/other 22%
Emerson College[35]

Margin of error: ± ?
Sample size: 487

April 2–8, 2015 Hillary Clinton
56%
Elizabeth Warren
11%
Joe Biden 8%
Bernie Sanders 3%
Martin O'Malley 2%
Jim Webb 1%
Andrew Cuomo 0%
Other 2%
Undecided 17%
Field Poll [36]

Margin of error: ± 5%
Sample size: 425

January 26 – February 16, 2015 Hillary Clinton
59%
Elizabeth Warren
17%
Joe Biden 9%
Bernie Sanders 6%
Jim Webb 2%
Others <0.5%
Undecided 7%

Colorado

Delegate count: 66 Pledged, 13 Unpledged

Winner
Bernie Sanders
Caucus date
March 1, 2016
Poll source Date 1st 2nd Other
Caucus results March 1, 2016 Bernie Sanders
59.44%
Hillary Clinton
39.85%
Other
0.71%
Washington Free Beacon/TPC Research[37]

Margin of error: ± 3%
Sample size: 1144

February 16–17, 2016 Bernie Sanders
49%
Hillary Clinton
43%
Undecided 9%
Quinnipiac University[38]

Margin of error: ± 4.9%
Sample size: 404

November 11–15, 2015 Hillary Clinton
55%
Bernie Sanders
27%
Martin O'Malley 2%
Undecided 15%
Suffolk University[39]

Margin of error: ± ?
Sample size: 159

September 13–16, 2014 Hillary Clinton
59%
Elizabeth Warren
21%
Joe Biden 8%
Andrew Cuomo 4%
Martin O’Malley 0%
Undecided 6%
Other 2%
Refused 1%

Connecticut

Delegate count: 55 Pledged, 15 Unpledged

Winner
Hillary Clinton
Primary date
April 26, 2016
Poll source Date 1st 2nd Other
Official Primary Results April 26, 2016 Hillary Clinton
51.8%
Bernie Sanders
46.4%
Others / Uncommitted
1.8%
Public Policy Polling[40]

Margin of error: ± 3.7%
Sample size: 709

April 22–24, 2016 Hillary Clinton
48%
Bernie Sanders
46%
Others / Undecided
6%
Quinnipiac[41]

Margin of error: ± 3.0%
Sample size: 1,037

April 12–18, 2016 Hillary Clinton
51%
Bernie Sanders
42%
Others / Undecided
8%
Emerson College[42]

Margin of error: ± 5.2%
Sample size: 356

April 10–11, 2016 Hillary Clinton
49%
Bernie Sanders
43%
Others / Undecided
3%
Emerson College Polling Society[43]

Margin of error: ± 6%
Sample size: 251 LV

November 17, 2015 Hillary Clinton
49.6%
Bernie Sanders
30.7%
Martin O’Malley 9.1%
Other 3.2%
Undecided 6.6%
Quinnipiac University[44]

Margin of error: ± 4%
Sample size: 610

October 7–11, 2015 Hillary Clinton
35%
Bernie Sanders
25%
Joe Biden 18%
Lincoln Chafee 0%
Lawrence Lessig 0%
Martin O’Malley 0%
Jim Webb 0%
Other 1%
Wouldn't vote 6%
Undecided 12%
Hillary Clinton
47%
Bernie Sanders
29%
Jim Webb 1%
Lincoln Chafee 0%
Lawrence Lessig 0%
Martin O’Malley 0%
Other 1%
Wouldn't vote 6%
Undecided 16%
Quinnipiac University[45]

Margin of error: ± 4.6%
Sample size: 459

March 6–9, 2015 Hillary Clinton
53%
Elizabeth Warren
15%
Joe Biden 8%
Bernie Sanders 2%
Martin O’Malley 1%
Jim Webb 1%
Other 2%
Wouldn't vote 3%
Undecided 15%

Delaware

Delegate count: 21 Pledged, 10 Unpledged

Winner
Hillary Clinton
Primary date
April 26, 2016
Poll source Date 1st 2nd Other
Official Primary results April 26, 2016 Hillary Clinton
59.8%
Bernie Sanders
39.2%
Other
1.1%
Gravis Marketing

Margin of error: ± 3.1%
Sample size: 1,026

April 17–18, 2016 Hillary Clinton
45%
Bernie Sanders
38%
Others / Undecided
17%

Florida

Delegate count: 214 Pledged, 32 Unpledged

Winner
Hillary Clinton
Primary date
March 15, 2016
Poll source Date 1st 2nd Other
Official Primary results March 15, 2016 Hillary Clinton
64.4%
Bernie Sanders
33.3%
Other
2.3%
ARG[46]

Margin of error: ± 5.0%
Sample size: 400

March 11–13, 2016 Hillary Clinton
58%
Bernie Sanders
37%
Others / Undecided 5%
Quinnipiac[47]

Margin of error: ± 4.3%
Sample size: 519

March 8–13, 2016 Hillary Clinton
60%
Bernie Sanders
34%
Others / Undecided 6%
Public Policy Polling[48]

Margin of error: ± 3.9%
Sample size: 627

March 11–12, 2016 Hillary Clinton
57%
Bernie Sanders
32%
Others / Undecided 11%
CBS News/YouGov[49]

Margin of error: ± 4.5%
Sample size: 796

March 9–11, 2016 Hillary Clinton
62%
Bernie Sanders
34%
Others / Undecided 4%
Florida Atlantic University[50]

Margin of error: ± 5%
Sample size: 414

March 8–11, 2016 Hillary Clinton
59%
Bernie Sanders
31%
Others / Undecided 10%
NBC News/Wall Street Journal/Marist[51]

Margin of error: ± 4.4%
Sample size: 500

March 4–10, 2016 Hillary Clinton
61%
Bernie Sanders
34%
Others / Undecided 5%
WTSP/Mason-Dixon[52]

Margin of error: ± 4.5%
Sample size: 500

March 7–9, 2016 Hillary Clinton
68%
Bernie Sanders
23%
Others / Undecided 9%
Quinnipiac[53]

Margin of error: ± 4.3%
Sample size: 511

March 2–7, 2016 Hillary Clinton
62%
Bernie Sanders
32%
Others / Undecided 6%
SurveyUSA/Bay News 9/News 13[54]

Margin of error: ± 3.4%
Sample size: 823

March 4–6, 2016 Hillary Clinton
61%
Bernie Sanders
30%
Others / Undecided 9%
CNN/ORC[55]

Margin of error: ± 6.0%
Sample size: 264

March 2–6, 2016 Hillary Clinton
61%
Bernie Sanders
34%
Others / Undecided 5%
Wash Post/Univision[56]

Margin of error: ± 6.0%
Sample size: 449

March 2-5, 2016 Hillary Clinton
64%
Bernie Sanders
26%
Others / Undecided 10%
University of North Florida[57]

Margin of error: ± 3.7%
Sample size: 685

February 22–27, 2016 Hillary Clinton
54%
Bernie Sanders
24%
Others / Undecided 22%
Public Policy Polling[58]

Margin of error: ± 5%
Sample size: 388

February 24–25, 2016 Hillary Clinton
57%
Bernie Sanders
32%
Others / Undecided 11%
Gravis Marketing[59]

Margin of error: ± 4.3%
Sample size: 514

February 24, 2016 Hillary Clinton
58%
Bernie Sanders
42%
Quinnipiac[60]

Margin of error: ± 4.5%
Sample size: 476

February 21–24, 2016 Hillary Clinton
59%
Bernie Sanders
33%
Others / Undecided 8%
Florida Southern College[61]

Margin of error: ± 4.0%
Sample Size: 608

January 30 – February 6, 2016 Hillary Clinton
43%
Bernie Sanders
26%
Others / Undecided 31%
Florida Atlantic University[62]

Margin of error: ± 5.0%
Sample Size: 371

January 15–18, 2016 Hillary Clinton
62%
Bernie Sanders
26%
Martin O'Malley 2%
Not Reported
Polls in 2015
Poll source Date 1st 2nd Other
Florida Atlantic University[62]

Margin of error: ± 5.2%
Sample Size: 355

November 15–16, 2015 Hillary Clinton
66%
Bernie Sanders
22%
Martin O'Malley 4%
Other 4.5%
Undecided 3.7%
Bay News 9/ News13[63]

Margin of error: ± 3.9%
Sample size: 826

October 28 – November 1, 2015 Hillary Clinton
66%
Bernie Sanders
24%
Martin O'Malley 3%
Other 2%
Undecided 6%
Saint Leo University Polling Institute[64]

Margin of error: ±6.0%
Sample size: 165

October 17–22, 2015 Hillary Clinton
50.9%
Joe Biden 15.2% Bernie Sanders 13.3%
Unsure/Don't Know 8.5%
Quinnipiac University[65]

Margin of error: ± 4.8%
Sample size: 411

September 25 – October 5, 2015 Hillary Clinton
43%
Joe Biden
19%
Bernie Sanders 19%
Someone else/Undecided 13%
Public Policy Polling[66]

Margin of error: ± 5.1%
Sample size: 368

September 11–13, 2015 Hillary Clinton
55%
Bernie Sanders
18%
Joe Biden 17%
Martin O'Malley 2%
Jim Webb 1%
Lincoln Chafee 1%
Lawrence Lessig 0%
Someone else/Undecided 6%
Gravis Marketing[67]

Margin of error: ± 4%
Sample size: 693

September 5–11, 2015 Hillary Clinton
41.6%
Joe Biden
21.4%
Bernie Sanders 12.5%
Martin O'Malley 1.5%
Jim Webb 1.3%
Lincoln Chafee 0.4%
Unsure 21.3%
Quinnipiac University[68]

Margin of error: ± 5%
Sample size: 419

Posted September 4, 2015 Hillary Clinton
52%
Bernie Sanders
20%
Joe Biden 15%
Lincoln Chafee 4%
Martin O'Malley 1%
Jim Webb 1%
Other 1%
Undecided 6%
Quinnipiac University[69]

Margin of error: ± 5.3%
Sample size: 345

August 7–18, 2015 Hillary Clinton
48%
Bernie Sanders
15%
Joe Biden 11%
Martin O'Malley 1%
Jim Webb 1%
Lincoln Chafee 0%
Other 2%
Wouldn't vote 6%
Undecided 17%
St Pete Polls[70]

Margin of error: ± 3.0%
Sample size: 1080

July 18–28, 2015 Hillary Clinton
55%
Bernie Sanders
29%
Jim Webb 2%
Martin O'Malley 1%
Lincoln Chafee <1%
Unsure or someone else 13%
Mason-Dixon[71]

Margin of error: ± 4.5%
Sample size: 500

July 20–23, 2015 Hillary Clinton
58%
Bernie Sanders
17%
Martin O'Malley 2%
Lincoln Chafee 0%
Jim Webb 0%
Undecided 23%
Gravis Marketing[72]

Margin of error: ± 3%
Sample size: 881

June 16–20, 2015 Hillary Clinton
64.8%
Bernie Sanders
20.6%
Martin O'Malley 2.1%
Bill De Blasio 1.7%
Jim Webb 0.9%
Lincoln Chafee 0.4%
Unsure 9.5%
Quinnipiac University[73]

Margin of error: ± 5%
Sample size: 378

June 4–15, 2015 Hillary Clinton
64%
Joe Biden
9%
Bernie Sanders 8%
Martin O'Malley 1%
Lincoln Chafee 0%
Jim Webb 0%
Other 1%
Wouldn't vote 5%
Undecided 13%
Quinnipiac University[74]

Margin of error: ± 5.3%
Sample size: 344

March 17–28, 2015 Hillary Clinton
65%
Joe Biden
11%
Elizabeth Warren 7%
Bernie Sanders 3%
Jim Webb 2%
Martin O'Malley 0%
Other 1%
Wouldn't vote 2%
Undecided 10%
Joe Biden
42%
Elizabeth Warren
19%
Bernie Sanders 6%
Jim Webb 3%
Martin O'Malley 1%
Other 2%
Wouldn't vote 4%
Undecided 22%
Public Policy Polling[75]

Margin of error: ± 5.1%
Sample size: 371

March 19–22, 2015 Hillary Clinton
58%
Joe Biden
14%
Elizabeth Warren 10%
Bernie Sanders 3%
Martin O'Malley 2%
Jim Webb 1%
Other/Undecided 11%
[76]

Margin of error: ± 5%
Sample size: 435

February 24–25, 2015 Hillary Clinton
52%
Elizabeth Warren
14%
Joe Biden 9%
Martin O'Malley 2%
Mark Warner 2%
Jim Webb 2%
Undecided 18%
Quinnipiac University[77]

Margin of error: ± 5.5%
Sample size: 322

January 22 – February 1, 2015 Hillary Clinton
61%
Joe Biden
11%
Elizabeth Warren 9%
Bernie Sanders 2%
Martin O'Malley 1%
Jim Webb 1%
Other 2%
Wouldn't vote 4%
Undecided 10%
Joe Biden
39%
Elizabeth Warren
22%
Bernie Sanders 3%
Martin O'Malley 2%
Jim Webb 2%
Other 4%
Wouldn't vote 5%
Undecided 23%
Polls in 2014
Poll source Date 1st 2nd Other
Quinnipiac University[78]

Margin of error: ± 4.6%
Sample size: 457

July 17–21, 2014 Hillary Clinton
67%
Joe Biden
8%
Elizabeth Warren 8%
Andrew Cuomo 1%
Martin O'Malley 0%
Brian Schweitzer 0%
Other 1%
Wouldn't vote 3%
Undecided 11%
Public Policy Polling[79]

Margin of error: ± 6.2%
Sample size: 251

June 6–9, 2014 Hillary Clinton
66%
Elizabeth Warren
8%
Joe Biden 7%
Cory Booker 5%
Andrew Cuomo 4%
Mark Warner 1%
Kirsten Gillibrand 0%
Martin O'Malley 0%
Brian Schweitzer 0%
Someone else/Undecided 9%
Quinnipiac University[80]

Margin of error: ± 4.4%
Sample size: 501

April 23–28, 2014 Hillary Clinton
64%
Joe Biden
11%
Elizabeth Warren 6%
Andrew Cuomo 1%
Martin O'Malley 1%
Brian Schweitzer 1%
Other 1%
Wouldn't vote 3%
Undecided 13%
Quinnipiac University[81]

Margin of error: ± 4.3%
Sample size: 529

January 22–27, 2014 Hillary Clinton
64%
Joe Biden
9%
Elizabeth Warren 5%
Andrew Cuomo 1%
Martin O'Malley 1%
Mark Warner 1%
Other 2%
Wouldn't vote 2%
Undecided 16%
Polls in 2013
Poll source Date 1st 2nd Other
Quinnipiac University[82]

Margin of error: ± 4.2%
Sample size: 544

November 12–17, 2013 Hillary Clinton
70%
Joe Biden
9%
Elizabeth Warren 4%
Andrew Cuomo 2%
Martin O'Malley 1%
Mark Warner 1%
Other 2%
Wouldn't vote 2%
Undecided 10%
Public Policy Polling

Margin of error: ± 5.7%
Sample size: 300

March 15–18, 2013 Hillary Clinton
62%
Joe Biden
12%
Andrew Cuomo 5%
Elizabeth Warren 3%
Martin O'Malley 1%
Brian Schweitzer 1%
Mark Warner 1%
Kirsten Gillibrand 0%
Deval Patrick 0%
Someone Else/Undecided 14%
Public Policy Polling

Margin of error: ± 4.9%
Sample size: 401

January 11–13, 2013 Hillary Clinton
65%
Joe Biden
15%
Andrew Cuomo 4%
Elizabeth Warren 4%
Deval Patrick 1%
Mark Warner 1%
Kirsten Gillibrand 0%
Martin O'Malley 0%
Brian Schweitzer 0%
Someone Else/Undecided 11%
Andrew Cuomo
22%
Elizabeth Warren
15%
Deval Patrick 5%
Martin O'Malley 4%
Kirsten Gillibrand 3%
Mark Warner 2%
Brian Schweitzer 1%
Someone Else/Undecided 48%

Georgia

Delegate count: 102 Pledged, 15 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd Other
Primary results March 1, 2016 Hillary Clinton
71.3%
Bernie Sanders
28.2%
Other 0.5%
SurveyMonkey[83]

Margin of error: ± ?
Sample size: 961

February 22–29, 2016 Hillary Clinton
59%
Bernie Sanders
36%
Others / Undecided 5%
WSB-TV/Landmark[84]

Margin of error: ± 3.5
Sample size: 800

February 28, 2016 Hillary Clinton
70%
Bernie Sanders
23%
Others / Undecided 7%
WSB-TV/Landmark[85]

Margin of error: ± 3.5%
Sample size: 800

February 26, 2016 Hillary Clinton
68%
Bernie Sanders
22%
Others / Undecided
10%
YouGov/CBS News[86]

Margin of error: ± 8.6%
Sample size: 492

February 22–26, 2016 Hillary Clinton
63%
Bernie Sanders
35%
Others / Undecided 2%
WABE 90.1[87]

Margin of error: ± 4.1%
Sample size: 400

February 22–24, 2016 Hillary Clinton
62%
Bernie Sanders
29%
Others / Undecided 9%
TEGNA/SurveyUSA[88]

Margin of error: ± 4.2%
Sample size: 501

February 22–23, 2016 Hillary Clinton
66%
Bernie Sanders
27%
Others / Undecided 7%
FOX 5 Atlanta[89]

Margin of error: ± 4.4%
Sample size: 491

February 22–23, 2016 Hillary Clinton
57%
Bernie Sanders
29%
Others / Undecided 14%
NBC News/Wall St. Jrnl[90]

Margin of error: ± 4.6%
Sample size: 461

February 18–23, 2016 Hillary Clinton
64%
Bernie Sanders
30%
Others / Undecided 6%
WSB-TV/Landmark[91]

Margin of error: ± 3.7%
Sample size: 700

February 21, 2016 Hillary Clinton
72%
Bernie Sanders
20%
Others / Undecided 8%
Public Policy Polling[92]

Margin of error: ± 4.4%
Sample size: 500

February 14–16, 2016 Hillary Clinton
60%
Bernie Sanders
26%
Landmark/RosettaStone

Margin of error: ± 4.0%
Sample size: 600

February 4, 2016 Hillary Clinton
63.3%
Bernie Sanders
21.5%
Undecided 15.2%
WXIA-TV/SurveyUSA[93]

Margin of error: ± 4.8%
Sample size: 2075

October 15–26, 2015 Hillary Clinton
73%
Bernie Sanders
16%
Martin O'Malley 4%
Undecided 5%
Opinion Savvy[94]

Margin of error: ± 4.8
Sample size: 413

Published September 3, 2015 Hillary Clinton
51%
Bernie Sanders
24%
Joe Biden 15%
Lincoln Chafee 5%
Martin O'Malley 0%
Jim Webb 0%
Someone else 1%
Undecided 5%

Hawaii

Delegate count: 53 Pledged, 7 Unpledged Delegate count: 25 Pledged, 9 Unpledged

Winner
Bernie Sanders
Caucus date
March 26, 2016
Poll source Date 1st 2nd
Caucus results April 26, 2016 Bernie Sanders
69.8%
Hillary Clinton
30.0%

No polls were conducted for the Hawaii Democratic caucuses

Idaho

Delegate count: 23 Pledged, 4 Unpledged

Winner
Bernie Sanders
Caucus date
March 22, 2016
Poll source Date 1st 2nd Other
Caucus results March 24, 2016 Bernie Sanders
78.04%
Hillary Clinton
21.21%
Other
0.75%
Dan Jones & Associates [95]

Margin of error: ± 4.0%
Sample size: 601

February 17–26, 2016 Bernie Sanders
47%
Hillary Clinton
45%
Dan Jones & Associates [96]

Margin of error: ± 4.02%
Sample size: 595

October 28 – November 4, 2015 Hillary Clinton
55%
Bernie Sanders
35%
Other candidates 4%
Don't know 6%
Dan Jones & Associates[97]

Margin of error: ± 4%
Sample size: 586

September 22–30, 2015 Hillary Clinton
38%
Bernie Sanders
36%
Joe Biden 16%
Other/DK/NR 10%
Dan Jones & Associates[98]

Margin of error: ± ?
Sample size: ?

Published August 9, 2015 Hillary Clinton
44%
Bernie Sanders
22%
Joe Biden 15%
Other/DK/NR 19%
Idaho Politics Weekly[99]

Margin of error: ± ?
Sample size: ?

June 17 – July 1, 2015 Hillary Clinton
19%
Bernie Sanders
12%
Joe Biden 10%
Someone else 18%
Don't know 32%

Illinois

Delegate count: 156 Pledged, 26 Unpledged

Winner
Hillary Clinton
Primary date
March 15, 2016
Poll source Date 1st 2nd Other
Primary results March 15, 2016 Hillary Clinton
50.6%
Bernie Sanders
48.6%
Others
0.8%
McKeon & Associates[100]

Margin of error: ± 4.1%
Sample size: 428

March 12, 2016 Hillary Clinton
31%
Bernie Sanders
30%
Others / Undecided 39%
Public Policy Polling[101]

Margin of error: ± 3.9%
Sample size: 627

March 11–12, 2016 Hillary Clinton
48%
Bernie Sanders
45%
Others / Undecided 7%
CBS News/YouGov[102]

Margin of error: ± 5.5%
Sample size: 756

March 9–11, 2016 Bernie Sanders
48%
Hillary Clinton
46%
Others / Undecided 6%
NBC News/Wall Street Journal/Marist[103]

Margin of error: ± 4.3%
Sample size: 529

March 4–10, 2016 Hillary Clinton
51%
Bernie Sanders
45%
Others / Undecided 4%
We Ask America[104]

Margin of error: ± 3.11%
Sample size: 994

March 7–8, 2016 Hillary Clinton
62%
Bernie Sanders
25%
Others / Undecided 13%
Chicago Tribune[105]

Margin of error: ±4.1%
Sample size: 600

March 2–6, 2016 Hillary Clinton
67%
Bernie Sanders
25%
Others / Undecided 8%
We Ask America[106]

Margin of error: ± 3.0
Sample size: 1,116

February 24, 2016 Hillary Clinton
57%
Bernie Sanders
28%
Others / Undecided 15%
The Simon Poll/SIU[107]

Margin of error: ± 5.6
Sample size: 306

February 15–20, 2016 Hillary Clinton
51%
Bernie Sanders
32%
Others / Undecided 17%
The Illinois Observer[108]

Margin of error: ± 4.23
Sample size: 560

February 11, 2016 Hillary Clinton
58%
Bernie Sanders
25%
Others / Undecided 18%
Public Policy Polling[109]

Margin of error: ± 4.9%
Sample size: 409

July 20–21, 2015 Hillary Clinton
60%
Bernie Sanders
23%
Others / Undecided 17%

Indiana

Delegate count: 83 Pledged, 9 Unpledged

Winner
Bernie Sanders
Primary date
May 3, 2016
Poll source Date 1st 2nd Other
Official Primary Results May 3, 2016 Bernie Sanders
52.5%
Hillary Clinton
47.5%
ARG[110]

Margin of error: ± 5%
Sample size: 400

April 27–28, 2016 Hillary Clinton
51%
Bernie Sanders
43%
Others / Undecided
6%
NBC/WSJ/Marist[111]

Margin of error: ± 3.9%
Sample size: 645

April 26–28, 2016 Hillary Clinton
50%
Bernie Sanders
46%
Others / Undecided
4%
IPFW/Mike Downs Center[112]

Margin of error: ± 4.9%
Sample size: 400

April 13–27, 2016 Hillary Clinton
55%
Bernie Sanders
40%
Others / Undecided
5%
IPFW/Downs Center[113]

Margin of error: ± 4.9%
Sample size: 400

April 18–23, 2016 Hillary Clinton
54%
Bernie Sanders
41%
Others / Undecided
5%
CBS/YouGov[114]

Margin of error: ± 8.2%
Sample size: 439

April 20–22, 2016 Hillary Clinton
49%
Bernie Sanders
44%
Others / Undecided
7%
FOX News[115]

Margin of error: ± 4%
Sample size: 603

April 18–21, 2016 Hillary Clinton
46%
Bernie Sanders
42%
Others / Undecided
12%
WTHR News[116]

Margin of error: ± 4.47%
Sample size: 500

April 18–21, 2016 Hillary Clinton
48%
Bernie Sanders
45%
Others / Undecided
7%

Iowa

Delegate count: 44 Pledged, 8 Unpledged

Winner
Hillary Clinton
Caucus date
February 1, 2016
Poll source Date 1st 2nd Other
Caucus results February 1, 2016 Hillary Clinton
49.9%
Bernie Sanders
49.6%
Martin O'Malley 0.6%
Emerson College[117]
Margin of error: ± 5.6%
Sample size: 300
January 29–31, 2016 Hillary Clinton
51%
Bernie Sanders
43%
Martin O'Malley 4%
Undecided 2%
Quinnipiac University[118]
Margin of error: ± 3.2%
Sample size: 919
January 25–31, 2016 Bernie Sanders
49%
Hillary Clinton
46%
Martin O'Malley 3%
Undecided 2%
Des Moines Register– Bloomberg–Selzer[119]
Margin of error: ± 4%
Sample size: 602
January 26–29, 2016 Hillary Clinton
45%
Bernie Sanders
42%
Martin O'Malley 3%
Undecided or Not Committed 9%
Public Policy Polling[120]

Margin of error ± 3.4%
Sample size: 851

January 26–27, 2016 Hillary Clinton
48%
Bernie Sanders
40%
Martin O'Malley 7%
No preference 5%
Gravis Marketing[121]

Margin of error ± 3%
Sample size: 810

January 26–27, 2016 Hillary Clinton
53%
Bernie Sanders
42%
Martin O'Malley 5%
No preference 0%
Monmouth University[122]

Margin of error ± 4.4%
Sample size: 504

January 23–26, 2016 Hillary Clinton
47%
Bernie Sanders
42%
Martin O'Malley 6%
Undecided 5%
American Research Group[123]

Margin of error ± 5.0%
Sample size: 400

January 21–24, 2016 Bernie Sanders
48%
Hillary Clinton
45%
Martin O'Malley 3%
No preference 4%
Quinnipiac University[124]

Margin of error: ± 4%
Sample size: 606

January 18–24, 2016 Bernie Sanders
49%
Hillary Clinton
45%
Martin O'Malley 4%
Undecided 2%
ISU/WHO-HD[125]

Margin of error: ±
Sample size: 356

January 5–22, 2016 Hillary Clinton
47%
Bernie Sanders
45%
Martin O'Malley <1%
Undecided 7%
Fox News[126]

Margin of error ± 4.5%
Sample size: 432

January 18–21, 2016 Hillary Clinton
48%
Bernie Sanders
42%
Martin O'Malley 3%
No preference 7%
YouGov/CBS News[127]

Margin of error ± 8.9%
Sample size: 906

January 17–21, 2016 Bernie Sanders
47%
Hillary Clinton
46%
Martin O'Malley 5%
No preference 2%
Emerson College Polling Society[128]

Margin of error: ± 5.9%
Sample size: 271

January 18–20, 2016 Hillary Clinton
52%
Bernie Sanders
43%
Martin O'Malley 3%
Undecided 2%
CNN/ORC[129]

Margin of error: ± 6%
Sample size: 280

January 15–20, 2016 Bernie Sanders
51%
Hillary Clinton
43%
Martin O'Malley 4%
Undecided 2%
Monmouth College/KBUR[130]

Margin of error: ± 4.1%
Sample size: 500

January 18–19, 2016 Hillary Clinton
47.7%
Bernie Sanders
39.3%
Martin O'Malley 7.4%
Undecided 5%
Loras College[131]

Margin of error: ± 4.4%
Sample size: 580

January 8–10, 2016 Hillary Clinton
46%
Bernie Sanders
40%
Martin O'Malley 8%
Undecided 5%
Public Policy Polling[132]

Margin of error: ± 4.1%
Sample size: 580

January 8–10, 2016 Hillary Clinton
46%
Bernie Sanders
40%
Martin O'Malley 8%
Undecided 5%
Bloomberg/DMR[133]

Margin of error: ± 4.4%
Sample size: 503

January 7–10, 2016 Hillary Clinton
42%
Bernie Sanders
40%
Martin O'Malley 4%
Other/Undecided 14%
American Research Group[134]

Margin of error: ± 4.0%
Sample size: 600

January 6–10, 2016 Bernie Sanders
47%
Hillary Clinton
44%
Martin O'Malley 3%
Undecided 5%
Quinnipiac University[135]

Margin of error: ± 4.4%
Sample size: 492

January 5–10, 2016 Bernie Sanders
49%
Hillary Clinton
44%
Martin O'Malley 4%
Undecided 3%
Mason-Dixon/AARP[136]

Margin of error: ±
Sample size: 503

January 4–8, 2016 Hillary Clinton
49%
Bernie Sanders
42%
Martin O’Malley 5%
Not Reported 4%
NBC News/WSJ/Marist[137]

Margin of error: ± 4.8%
Sample size: 422

January 2–7, 2016 Hillary Clinton
48%
Bernie Sanders
45%
Martin O’Malley 5%
Undecided 3%
Polls in 2015
Poll source Date 1st 2nd Other
Gravis Marketing[138]

Margin of error ± 5%
Sample Size: 418

December 18–21, 2015 Hillary Clinton
49%
Bernie Sanders
31%
Martin O'Malley 10%
Unsure 10%
YouGov/CBS News[139]

Margin of error ± 5.3%
Sample Size: 1252

December 14–17, 2015 Hillary Clinton
50%
Bernie Sanders
45%
Martin O'Malley 4%
No preference 1%
Public Policy Polling[140]

Margin of error: ± 4.3%
Sample Size: 526

December 10–13, 2015 Hillary Clinton
52%
Bernie Sanders
34%
Martin O'Malley 7%
Undecided 6%
Quinnipiac University[141]

Margin of error: ± 3.6%
Sample Size: 727

December 4–13, 2015 Hillary Clinton
51%
Bernie Sanders
40%
Martin O'Malley 6%
Undecided 3%
Fox News[142]

Margin of error: ± 5.0%
Sample Size: 357

December 7–10, 2015 Hillary Clinton
50%
Bernie Sanders
36%
Martin O'Malley 5%
Other 4%
Undecided 10%
Loras College[143]

Margin of error: ± 4.4
Sample Size: 501

December 7–10, 2015 Hillary Clinton
59%
Bernie Sanders
27%
Martin O'Malley 4%
Undecided 10%
Des Moines Register/Bloomberg/Selzer[144]

Margin of error ± 4.9%
Sample Size: 404

December 7–10, 2015 Hillary Clinton
48%
Bernie Sanders
39%
Martin O'Malley 4%
Undeicded 8%
Monmouth[145] Margin of error ± 4.9%

Sample Size: 405

December 3–6, 2015 Hillary Clinton
55%
Bernie Sanders
33%
Martin O'Malley 6%
CNN/ORC[145] Margin of error ± 4.5%


Sample Size: 442

November 28 – December 6, 2015 Hillary Clinton
54%
Bernie Sanders
36%
Martin O'Malley 4%
Quinnipiac University[146]

Margin of error ± 4.2%
Sample Size: 543

November 16–22, 2015 Hillary Clinton
51%
Bernie Sanders
42%
Martin O'Malley 4%
Undecided 3%
YouGov/CBS News[147]

Margin of error ± 7.6%
Sample Size: 602

November 15–19, 2015 Hillary Clinton
50%
Bernie Sanders
44%
Martin O'Malley 5%
Undecided 1%
CNN/ORC[148]

Margin of error ± 4.5%
Sample Size: 498

October 29 – November 4, 2015 Hillary Clinton
55%
Bernie Sanders
37%
Martin O'Malley 3%
None 1%
No Opinion 3%
Gravis Marketing/One America News Network[149]

Margin of error ± 3.0%
Sample Size: 272

October 30 – November 2, 2015 Hillary Clinton
57.1%
Bernie Sanders
24.8%
Martin O'Malley 2.9%
Not Sure 15.2%
Public Policy Polling[150]

Margin of error ± 3.9%
Sample Size: 615

October 30 – November 1, 2015 Hillary Clinton
57%
Bernie Sanders
25%
Martin O'Malley 7%
Lawrence Lessig 1%
Not Sure 9%
KBUR-Monmouth[151]

Margin of error: ± 3.76%
Sample size: 681

October 29–31, 2015 Hillary Clinton
45.8%
Bernie Sanders
31.7%
Martin O'Malley 5.4%
Undecided 17.0%
Monmouth University[152]

Margin of error ± 3.76%
Sample size: 681

October 29–31, 2015 Hillary Clinton
45.8%
Bernie Sanders
31.7%
Martin O'Malley 5.4%
Undecided 17%
Monmouth University[153]

Margin of error ± 4.9%
Sample size: 400

October 22–25, 2015 Hillary Clinton
65%
Bernie Sanders
24%
Martin O'Malley 5%
Lawrence Lessig 1%
Undecided 5%
YouGov/CBS News[154]

Margin of error ± 6.9%
Sample size: 555

October 15–22, 2015 Hillary Clinton
46%
Bernie Sanders
43%
Martin O'Malley 3%
Lincoln Chafee 1%
Lawrence Lessig 0%
No preference 7%
Des Moines Register/Bloomberg Politics[155]

Margin of error ± 4.9%
Sample size: 402

October 16–19, 2015 Hillary Clinton
48%
Bernie Sanders
41%
Martin O'Malley 2%
Jim Webb 1%
Lincoln Chafee 1%
Uncommited 3%
Not Sure 4%
NBC News/WSJ/Marist[156]

Margin of error: ± 5.3%
Sample size: 348

September 23–30, 2015 Hillary Clinton
33%
Bernie Sanders
28%
Joe Biden 22%
Martin O'Malley 3%
Jim Webb 1%
Lincoln Chafee <1%
Undecided 12%
Hillary Clinton
47%
Bernie Sanders
36%
Martin O'Malley 4%
Jim Webb 1%
Lincoln Chafee <1%
Undecided 13%
Public Policy Polling[157]

Margin of error ± 4.4%
Sample size: 494

September 18–20, 2015 Hillary Clinton
43%
Bernie Sanders
22%
Joe Biden 17%
Martin O'Malley 3%
Jim Webb 3%
Lincoln Chafee 2%
Lawrence Lessig 0%
Undecided 9%
YouGov/CBS News[158]

Margin of error ± 6.6%
Sample size: 646

September 3–10, 2015 Bernie Sanders
43%
Hillary Clinton
33%
Joe Biden 10%
No preference 7%
Martin O'Malley 5%
Lincoln Chafee 1%
Jim Webb 1%
Quinnipiac University[159]

Margin of error: ± 3.4%
Sample size: 832

Posted September 10, 2015 Bernie Sanders
41%
Hillary Clinton
40%
Joe Biden 12%
Martin O'Malley 3%
NBC News/Marist Poll[160]

Margin of error: ± 5.3%
Sample size: 345

Published September 6, 2015 Hillary Clinton
38%
Bernie Sanders
27%
Joe Biden 20%
Martin O'Malley 4%
Jim Webb 2%
Lincoln Chafee 1%
Undecided 8%
Hillary Clinton
48%
Bernie Sanders
37%
Martin O'Malley 4%
Jim Webb 2%
Lincoln Chafee 1%
Undecided 8%
Loras College[161]

Margin of error ± 4.37%
Sample size: 502

August 24–27, 2015 Hillary Clinton
48.2%
Bernie Sanders
22.9%
Joe Biden 16.3%
Martin O'Malley 4%
Lincoln Chafee 0.6%
Jim Webb 0.4%
Undecided 6.4%
Selzer & Co. of Des Moines[162]

Margin of error: ± 4.9%
Sample size: 404

August 23–26, 2015 Hillary Clinton
43%
Bernie Sanders
35%
Martin O'Malley 5%
Jim Webb 2%
Lincoln Chafee 1%
Not sure 8%
Uncommitted 6%
Hillary Clinton
37%
Bernie Sanders
30%
Joe Biden 14%
Martin O'Malley 3%
Jim Webb 2%
Lincoln Chafee 1%
Not sure 8%
Uncommitted 6%
Suffolk University[163]

Margin of error: ± 4.4%
Sample size: 500

August 20–24, 2015 Hillary Clinton
54%
Bernie Sanders
20%
Joe Biden 11%
Martin O'Malley 4%
Jim Webb 1%
Lincoln Chafee 0%
Undecided 9%
CNN/ORC[164]

Margin of error: ± 4.5%
Sample size: 429

August 7–11, 2015 Hillary Clinton
50%
Bernie Sanders
31%
Joe Biden 12%
Martin O'Malley 1%
Jim Webb 1%
Lincoln Chafee 0%
Not sure 11%
Public Policy Polling[165]

Margin of error: ± 4.1%
Sample size: 567

August 7–9, 2015 Hillary Clinton
52%
Bernie Sanders
25%
Martin O'Malley 7%
Jim Webb 3%
Lincoln Chafee 1%
Not sure 11%
NBC News/Marist[166]

Margin of error: ± 5.5%
Sample size: 320

July 14–21, 2015 Hillary Clinton
49%
Bernie Sanders
25%
Joe Biden 10%
Martin O'Malley 3%
Jim Webb 1%
Lincoln Chafee <1%
Undecided 11%
We Ask America[167]

Margin of error: 3.07%
Sample size: 1,022

June 27–29, 2015 Hillary Clinton
63%
Bernie Sanders
20%
Martin O'Malley 5%
Jim Webb 3%
Lincoln Chafee 1%
Undecided 8%
Quinnipiac University[168]

Margin of error: 3.6%
Sample size: 761

June 20–29, 2015 Hillary Clinton
52%
Bernie Sanders
33%
Joe Biden 7%
Martin O'Malley 3%
Jim Webb 1%
Lincoln Chafee 0%
Undecided 5%
Bloomberg

Margin of error: 4.9%
Sample size: 401

June 19–22, 2015 Hillary Clinton
50%
Bernie Sanders
24%
Martin O'Malley 2%
Lincoln Chafee 0%
Undecided 23%
Morning Consult

Margin of error: ?
Sample size: 322

May 31 – June 8, 2015 Hillary Clinton
54%
Bernie Sanders
12%
Joe Biden 9%
Martin O'Malley 1%
Jim Webb 1%
Lincoln Chafee 0%
Other 3%
Undecided 20%
Gravis Marketing

Margin of error: ± 5.0%
Sample size: 434

May 28–29, 2015 Hillary Clinton
59%
Bernie Sanders
15%
Martin O'Malley 3%
Jim Webb 2%
Bill DeBlasio 2%
Lincoln Chafee 1%
Unsure 17%
Bloomberg/Des Moines

Margin of error: ± 4.7%
Sample size: 437

May 25–29, 2015 Hillary Clinton
57%
Bernie Sanders
16%
Joe Biden 8%
Martin O'Malley 2%
Jim Webb 2%
Uncommitted 6%
Not sure 8%
Quinnipiac University

Margin of error: ± 3.7%
Sample size: 692

April 25 – May 4, 2015 Hillary Clinton
60%
Bernie Sanders
15%
Joe Biden 11%
Martin O'Malley 3%
Jim Webb 3%
Lincoln Chafee 0%
Undecided 7%
Public Policy Polling

Margin of error: ± 4.5%
Sample size: 466

April 23–26, 2015 Hillary Clinton
62%
Bernie Sanders
14%
Martin O'Malley 6%
Jim Webb 3%
Lincoln Chafee 2%
Undecided 13%
Loras College

Margin of error: ± 4.4%
Sample size: 491

April 21–23, 2015 Hillary Clinton
57%
Elizabeth Warren
14.7%
Joe Biden 5.9%
Martin O'Malley 2.4%
Bernie Sanders 2%
Jim Webb 1.2%
Lincoln Chafee 0%
Undecided 16.7%
Quinnipiac

Margin of error: ± 3.9%
Sample size: 619

February 16–23, 2015 Hillary Clinton
61%
Elizabeth Warren
19%
Joe Biden 7%
Bernie Sanders 5%
Jim Webb 2%
Martin O'Malley 0%
Undecided 6%
NBC News/Marist

Margin of error: ± 5.5%
Sample size: 321

February 3–10, 2015 Hillary Clinton
68%
Joe Biden
12%
Bernie Sanders 7%
Jim Webb 1%
Martin O'Malley <1%
Undecided 12%
Selzer & Co.

Margin of error: ± 4.9%
Sample size: 401

January 26–29, 2015 Hillary Clinton
56%
Elizabeth Warren
16%
Joe Biden 9%
Bernie Sanders 5%
Jim Webb 3%
Martin O'Malley 1%
Uncommitted 4%
Not sure 6%
Loras College

Margin of error: ± 6.06%
Sample size: 261

January 21–26, 2015 Hillary Clinton
48.3%
Elizabeth Warren
16.5%
Joe Biden 12.6%
Bernie Sanders 3.8%
Jim Webb 2.3%
Martin O'Malley 0.4%
Undecided 16.1%
Polls in 2014
Poll source Date 1st 2nd Other
Fox News

Margin of error: ± 5%
Sample size: 352

October 28–30, 2014 Hillary Clinton
62%
Elizabeth Warren
14%
Joe Biden 10%
Andrew Cuomo 2%
Martin O'Malley 2%
Other 1%
None of the above 2%
Don't know 6%
Reuters/Ipsos

Margin of error: ± ?
Sample size: 552

October 23–29, 2014 Hillary Clinton
60%
Elizabeth Warren
17%
Joe Biden 4%
Andrew Cuomo 3%
Bernie Sanders 2%
Kirsten Gillibrand 1%
Martin O'Malley 1%
Wouldn't vote 12%
Selzer & Co.

Margin of error: ± 4.8%
Sample size: 426

October 1–7, 2014 Hillary Clinton
53%
Elizabeth Warren
10%
Joe Biden 9%
John Kerry 7%
Bernie Sanders 3%
Andrew Cuomo 1%
Brian Schweitzer 1%
Jim Webb 1%
Martin O'Malley 0%
Uncommitted 3%
Not sure 12%
CNN/ORC

Margin of error: ± 5.5%
Sample size: 309

September 8–10, 2014 Hillary Clinton
53%
Joe Biden
15%
Elizabeth Warren 7%
Bernie Sanders 5%
Andrew Cuomo 3%
Martin O'Malley 2%
Deval Patrick 1%
Someone else 1%
None/No opinion 15%
Suffolk

Margin of error: ± 7.09%
Sample size: 191

August 23–26, 2014 Hillary Clinton
66.49%
Elizabeth Warren
9.95%
Joe Biden 7.85%
Andrew Cuomo 4.19%
Martin O'Malley 2.09%
Undecided 7.85%
NBC News/Marist

Margin of error: ± 4.2%
Sample size: 539

July 7–13, 2014 Hillary Clinton
70%
Joe Biden
20%
Undecided 10%
Vox Populi Polling

Margin of error: ± 6.6%
Sample size: 223

June 4–5, 2014 Hillary Clinton
65%
Joe Biden
18%
Elizabeth Warren 12%
Andrew Cuomo 3%
Martin O'Malley 2%
Public Policy Polling

Margin of error: ±5.2%
Sample size: 356

May 15–19, 2014 Hillary Clinton
59%
Joe Biden
12%
Elizabeth Warren 11%
Cory Booker 3%
Andrew Cuomo 3%
Mark Warner 2%
Kirsten Gillibrand 1%
Martin O'Malley 1%
Brian Schweitzer 1%
Someone else/Not sure 8%
Joe Biden
34%
Elizabeth Warren
22%
Andrew Cuomo 7%
Cory Booker 4%
Kirsten Gillibrand 3%
Martin O'Malley 2%
Brian Schweitzer 1%
Mark Warner 1%
Someone else/Not sure 26%
Elizabeth Warren
31%
Andrew Cuomo
14%
Cory Booker 9%
Kirsten Gillibrand 5%
Martin O'Malley 2%
Mark Warner 2%
Brian Schweitzer 1%
Someone else/Not sure 36%
Suffolk

Margin of error: ± 8.4%
Sample size: 135

April 3–8, 2014 Hillary Clinton
62.96%
Elizabeth Warren
11.85%
Joe Biden 9.63%
Mark Warner 1.48%
Andrew Cuomo 0.74%
Deval Patrick 0.74%
Cory Booker 0%
Undecided 11.85%
Public Policy Polling

Margin of error: ±5.4%
Sample size: 335

February 20–23, 2014 Hillary Clinton
67%
Joe Biden
12%
Elizabeth Warren 5%
Mark Warner 3%
Andrew Cuomo 2%
Cory Booker 1%
Kirsten Gillibrand 0%
Martin O'Malley 0%
Brian Schweitzer 0%
Someone Else/Undecided 10%
Joe Biden
40%
Elizabeth Warren
13%
Andrew Cuomo 8%
Martin O'Malley 5%
Cory Booker 2%
Kirsten Gillibrand 2%
Mark Warner 2%
Brian Schweitzer 1%
Someone Else/Undecided 28%
Elizabeth Warren
21%
Andrew Cuomo
11%
Cory Booker 8%
Martin O'Malley 6%
Kirsten Gillibrand 3%
Brian Schweitzer 2%
Mark Warner 2%
Someone Else/Undecided 47%
Polls in 2013
Poll source Date 1st 2nd Other
Cygnal

Margin of error: ±2.1%
Sample size: 2,175

July 10–12, 2013 Hillary Clinton
55.6%
Joe Biden
7.8%
Elizabeth Warren 5%
Andrew Cuomo 1.1%
Kirsten Gillibrand 0.5%
Martin O'Malley 0.2%
Unsure 29.7%
Public Policy Polling

Margin of error: ±6.1%
Sample size: 260

July 5–7, 2013 Hillary Clinton
71%
Joe Biden
12%
Elizabeth Warren 5%
Kirsten Gillibrand 2%
Mark Warner 2%
Cory Booker 1%
Andrew Cuomo 1%
Martin O'Malley 1%
Brian Schweitzer 0%
Someone Else/Undecided 5%
Joe Biden
51%
Elizabeth Warren
16%
Andrew Cuomo 9%
Cory Booker 6%
Kirsten Gillibrand 2%
Martin O'Malley 2%
Mark Warner 1%
Brian Schweitzer 0%
Someone Else/Undecided 13%
Elizabeth Warren
20%
Andrew Cuomo
18%
Cory Booker 12%
Kirsten Gillibrand 7%
Martin O'Malley 4%
Brian Schweitzer 3%
Mark Warner 2%
Someone Else/Undecided 33%
Public Policy Polling

Margin of error: ±5.5%
Sample size: 313

February 1–3, 2013 Hillary Clinton
68%
Joe Biden
21%
Andrew Cuomo 2%
Mark Warner 2%
Elizabeth Warren 2%
Deval Patrick 1%
Kirsten Gillibrand 0%
Martin O'Malley 0%
Brian Schweitzer 0%
Someone Else/Undecided 3%
Joe Biden
58%
Andrew Cuomo
13%
Elizabeth Warren 7%
Kirsten Gillibrand 6%
Deval Patrick 3%
Mark Warner 2%
Brian Schweitzer 1%
Martin O'Malley 0%
Someone Else/Undecided 11%
Andrew Cuomo
26%
Elizabeth Warren
17%
Martin O'Malley 8%
Kirsten Gillibrand 5%
Deval Patrick 3%
Brian Schweitzer 2%
Mark Warner 2%
Someone Else/Undecided 37%
Harper Polling

Margin of error:
Sample size: 183

January 29, 2013 Hillary Clinton
65.38%
Joe Biden
13.74%
Andrew Cuomo 3.85%
Undecided 17.03%

Kansas

Delegate count: 33 Pledged, 4 Unpledged

Winner
Bernie Sanders
Caucus date
March 5, 2016
Poll source Date 1st 2nd 3rd Other
Caucus results March 5, 2016 Bernie Sanders
67.9%
Hillary Clinton
32.1%
Uncommitted
0.0%
Fort Hays State University[169]

Margin of error: ± 5.0
Sample size: 440

February 19–26, 2016 Hillary Clinton
33%
Bernie Sanders
23%
Undecided 44%
Suffolk University[170]

Margin of error: ± ?
Sample size: 118

September 27–30, 2014 Hillary Clinton
62%
Elizabeth Warren
14%
Joe Biden
4%
Andrew Cuomo 4%, Martin O'Malley 1%, Other 2%, Undecided/Refused 14%

Kentucky

Delegate count: 55 Pledged, 5 Unpledged

Winner
Hillary Clinton
Primary date
May 17, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary results May 17, 2016 Hillary Clinton
46.8%
Bernie Sanders
46.3%
Others / Uncommitted
6.9%
Public Policy Polling[171]

Margin of error: ± 4.4%
Sample size: 501

March 1–2, 2016 Hillary Clinton
43%
Bernie Sanders
38%
Others / Undecided
19%
Public Policy Polling[172]

Margin of error: ± 4%
Sample size: 610

June 18–21, 2015 Hillary Clinton
56%
Bernie Sanders
12%
Jim Webb
7%
Lincoln Chafee 5%, Martin O'Malley 3%, Not sure 18%

Louisiana

Delegate count: 51 Pledged, 8 Unpledged

Winner
Hillary Clinton
Primary date
March 5, 2016
Poll source Date 1st 2nd 3rd Other
Certified Primary results March 5, 2016 Hillary Clinton
71.1%
Bernie Sanders
23.2%
Others
5.7%
Magellan Strategies[173]

Margin of error: ± 3.3%
Sample size: 865

March 1, 2016 Hillary Clinton
61%
Bernie Sanders
14%
Others / Undecided
25%
Public Policy Polling[174]

Margin of error: ± 4.4
Sample size: 500

February 14–16, 2016 Hillary Clinton
60%
Bernie Sanders
29%
WWL-TV-Clarus[175]

Margin of error: ?
Sample size: ?

September 20–23, 2015 Hillary Clinton
57%
Joe Biden
22%
Bernie
Sanders
7%
Martin O'Malley 2%, Jim Webb 1%, Lincoln Chafee 0%

Maine

Delegate count: 25 Pledged, 5 Unpledged

Winner
Bernie Sanders
Primary date
March 6, 2016
Poll source Date 1st 2nd Other
Caucus results March 6, 2016 Bernie Sanders
64.3
Hillary Clinton
35.5%
Other
0.2%
Critical Insights[176]

Margin of error: 4%
Sample size: 600

September 24–30, 2015 Bernie Sanders
28%
Hillary Clinton
27%
Other/DK/NR 45%

Maryland

Delegate count: 95 Pledged, 23 Unpledged

Winner
Hillary Clinton
Primary date
April 26, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary results April 26, 2016 Hillary Clinton
62.5%
Bernie Sanders
33.8%
Others / Uncommitted
3.7%
ARG[177]

Margin of error: ± 5.0%
Sample size: 400

April 21-24, 2016 Hillary Clinton
50%
Bernie Sanders
44%
Others / Undecided
6%
Monmouth[178]

Margin of error: ± 5.7%
Sample size: 300

April 18-20, 2016 Hillary Clinton
57%
Bernie Sanders
32%
Others / Undecided
11%
Public Policy Polling[179]

Margin of error: ± 4.4%
Sample size: 492

April 15-17, 2016 Hillary Clinton
58%
Bernie Sanders
33%
Others / Undecided
9%
NBC 4/Marist[180]

Margin of error: ± 3.5%
Sample size: 775

April 5-9, 2016 Hillary Clinton
58%
Bernie Sanders
36%
Others / Undecided
6%
University of Maryland/Washington Post[181]

Margin of error: ± 5.5%
Sample size: 539

March 30 - April 4, 2016 Hillary Clinton
55%
Bernie Sanders
40%
Others / Undecided
5%
Baltimore Sun[182]

Margin of error: ± 4.9%
Sample size: 400

March 4-8, 2016 Hillary Clinton
61%
Bernie Sanders
28%
Others / Undecided
11%
Gonzales/Arscott Research[183]

Margin of error: ± 5.0
Sample size: 411

February 29-March 4, 2016 Hillary Clinton
57%
Bernie Sanders
26%
Others / Undecided
17%
Goucher[184]

Margin of error: ± 3.5
Sample size: 794

February 13–18, 2016 Hillary Clinton
58%
Bernie Sanders
28%
Others / Undecided
14%
Baltimore Sun/University of Baltimore

Margin of error: ± 5%
Sample size: 402

January 11–16, 2016 Hillary Clinton
40%
Bernie Sanders
27%
Others / Undecided
33%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
Baltimore Sun/University of Baltimore

Margin of error: ± 4.8%
Sample size: 419

November 13–17, 2015 Hillary Clinton
56%
Bernie Sanders
23%
Martin O'Malley
7%
Other/Unsure 14%
Washington Post

Margin of error: ± 5%
Sample size: 490

October 8–11, 2015 Hillary Clinton
43%
Joe Biden
26%
Bernie Sanders
20%
Martin O'Malley 4%, Jim Webb 1%, Lincoln Chafee 0%, None/Any/Other 3%, No Opinion 2%
Goucher[185]

Margin of error: ± 5.7%
Sample size: 300

September 26 – October 1, 2015 Hillary Clinton
43%
Joe Biden
23%
Bernie Sanders
17%
Martin O'Malley 2%, Jim Webb 2%, Lincoln Chafee 0%, None/Any/Other 2%, Undecided 11%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
Washington Post[186]

Margin of error: ± 5%
Sample size: 538

February 13–16, 2014 Hillary Clinton
72%
Joe Biden
9%
Martin O'Malley
6%
Elizabeth Warren 3%, Andrew Cuomo 2%, None 1%, Undecided 7%
Baltimore Sun

Margin of error: ± 4.4%
Sample size: 500

February 8–12, 2014 Hillary Clinton
59%
Joe Biden
14%
Martin O'Malley
6%
Andrew Cuomo 4%, Undecided/Other 17%
Polls in 2013
Poll source Date 1st 2nd 3rd Other
Washington Post

Margin of error:
Sample size:

February 21–24, 2013 Hillary Clinton
56%
Joe Biden
18%
Martin O'Malley
8%
Andrew Cuomo 4%, None/other/any of them 4%, No opinion 9%

Massachusetts

Delegate count: 91 Pledged, 25 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd 3rd Other
Primary results March 1, 2016 Hillary Clinton
49.7%
Bernie Sanders
48.3%
Others / Uncommitted
2.0%
SurveyMonkey[187]

Margin of error: ± ?
Sample size: 1,224

February 22–29, 2016 Hillary Clinton
48%
Bernie Sanders
46%
Others / Undecided
6%
Emerson College[188]

Margin of error: ± 3.7%
Sample size: 670

February 26–28, 2016 Hillary Clinton
54%
Bernie Sanders
43%
Others / Undecided
3%
Suffolk University[189]

Margin of error: ± 4.4%
Sample size: 500

February 25–27, 2016 Hillary Clinton
50%
Bernie Sanders
42%
Others / Undecided
8%
WBZ-UMass Amherst[190]

Margin of error: ± 6.5%
Sample size: 400

February 19–25, 2016 Hillary Clinton
47%
Bernie Sanders
44%
Others / Undecided
9%
WBUR[191]

Margin of error: ± 4.9%
Sample size: 418

February 21–23, 2016 Hillary Clinton
49%
Bernie Sanders
44%
Others / Undecided
7%
Emerson College[192]

Margin of error: ± 4.75%
Sample size: 417

February 19–21, 2016 Hillary Clinton
46%
Bernie Sanders
46%
Undecided 5%
Public Policy Polling[193]

Margin of error: ± 4.2
Sample Size: 538

February 14–16, 2016 Bernie Sanders
49%
Hillary Clinton
42%
Undecided 9%
Emerson College

Margin of error: ± 6.0%
Sample size: 265

October 16–18, 2015 Hillary Clinton
59%
Bernie Sanders
25%
Jim Webb
5%
Martin O'Malley 3%, Lincoln Chafee 3%, Other 2%, Undecided 3%
Emerson College[194]

Margin of error: ± ?
Sample size: 430

March 14–19, 2015 Hillary Clinton
43%
Elizabeth Warren
16%
Joe Biden
10%
Bernie Sanders 6%, Martin O'Malley 2%, Other/Undecided 24%
Gravis Marketing

Margin of error: ± 4%
Sample size: 358

January 19–21, 2015 Hillary Clinton
46%
Elizabeth Warren
22%
Undecided 32%
Suffolk University

Margin of error: ± 4.9%
Sample size: 400

August 21–24, 2014 Hillary Clinton
55%
Elizabeth Warren
17.25%
Joe Biden
7.75%
Andrew Cuomo 4.75%, Martin O'Malley 1.5%, Undecided 12.25%, Refused 1.25%, Other 0.25%
Public Policy Polling

Margin of error: ± 3.8%
Sample size: 666

May 1–2, 2013 Hillary Clinton
55%
Joe Biden
17%
Andrew Cuomo
4%
Deval Patrick 4%, Elizabeth Warren 4%, Martin O'Malley 1%, Kirsten Gillibrand 0%, Brian Schweitzer 0%, Mark Warner 0%, Someone else/Not sure 14%

Michigan

Delegate count: 130 Pledged, 17 Unpledged

Winner
Bernie Sanders
Primary date
March 8, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary results March 8, 2016 Bernie Sanders
49.7%
Hillary Clinton
48.3%
Others / Uncommitted
2.1%
FOX 2 Detroit/Mitchell[195]

Margin of error: ± 4.5%
Sample size: 482

March 7, 2016 Hillary Clinton
61%
Bernie Sanders
34%
Others / Undecided
5%
FOX 2 Detroit/Mitchell[196]

Margin of error: ± 4.5%
Sample size: 475

March 6, 2016 Hillary Clinton
66%
Bernie Sanders
29%
Others / Undecided
5%
Monmouth[197]

Margin of error: ± 5.6%
Sample size: 302

March 3–6, 2016 Hillary Clinton
55%
Bernie Sanders
42%
Others / Undecided
4%
ARG[198]

Margin of error: ± 5.0%
Sample size: 400

March 4–5, 2016 Hillary Clinton
60%
Bernie Sanders
36%
Others / Undecided
4%
CBS News/YouGov[198]

Margin of error: ± 7.7%
Sample size: 597

March 2–4, 2016 Hillary Clinton
55%
Bernie Sanders
44%
Others / Undecided
1%
Mitchell/FOX 2[199]

Margin of error: ± 4.0%
Sample size: 610

March 2–3, 2016 Hillary Clinton
55%
Bernie Sanders
37%
Others / Undecided
8%
NBC News/Wall St. Jrnl[200]

Margin of error: ± 4.2%
Sample size: 546

March 1–3, 2016 Hillary Clinton
57%
Bernie Sanders
40%
Others / Undecided
3%
MSU[201]

Margin of error: ± 6.1%
Sample size: 262

January 25-March 3, 2016 Hillary Clinton
52%
Bernie Sanders
47%
Others / Undecided
1%
FOX 2 Detroit/Mitchell[202]

Margin of error: ± 4.7%
Sample size: 427

March 1, 2016 Hillary Clinton
61%
Bernie Sanders
33%
Others / Undecided
6%
MRG[203]

Margin of error: ± 4.0%
Sample size: 218

February 22–27, 2016 Hillary Clinton
56%
Bernie Sanders
36%
Others / Undecided
8%
FOX 2 Detroit/Mitchell[204]

Margin of error: ± 5.3%
Sample size: 344

February 23, 2016 Hillary Clinton
65%
Bernie Sanders
31%
Others / Undecided
4%
ARG[205]

Margin of error: ± 5%
Sample size: 400

February 19–20, 2016 Hillary Clinton
53%
Bernie Sanders
40%
Others / Undecided
7%
Fox 2 Detroit/Mitchell[206]

Margin of error: ± 4.69%
Sample size: 430

February 15, 2016 Hillary Clinton
60%
Bernie Sanders
27%
Others / Undecided 13%
Public Policy Polling[207]

Margin of error: ± 4.4
Sample size: 500

February 14–16, 2016 Hillary Clinton
50%
Bernie Sanders
40%
Fox 2 Detroit/Mitchell[208]

Margin of error: ± 5.5%
Sample size: 321

February 4, 2016 Hillary Clinton
57%
Bernie Sanders
28%
Others / Undecided 15%
IMP/Target Insyght [208]

Margin of error: ± 5.0%
Sample size: 400

February 2–4, 2016 Hillary Clinton
62%
Bernie Sanders
30%
Others / Undecided 8%
Marketing Resource Group[209]

Margin of error: ± 4%
Sample size: 600

September 9–14, 2015 Hillary Clinton
41%
Bernie Sanders
22%
Joe Biden 22% Martin O'Malley 1%, Undecided 12%
Public Policy Polling[210]

Margin of error: ± 4.7%
Sample size: 431

June 25–28, 2015 Hillary Clinton
57%
Bernie Sanders
25%
Lincoln Chafee 5% Jim Webb 2%, Martin O'Malley 1%, Not sure 10%
Suffolk

Margin of error: ± ?
Sample size: 212

September 6–10, 2014 Hillary Clinton
61%
Joe Biden
17%
Elizabeth Warren
7%
Andrew Cuomo 4%, Martin O'Malley 1%, Undecided 9%, Refused 1%

Minnesota

Delegate count: 77 Pledged, 16 Unpledged

Winner
Bernie Sanders
Caucus date
March 1, 2016
Poll source Date 1st 2nd 3rd Other
Caucus results March 1, 2016 Bernie Sanders
61.6%
Hillary Clinton
38.4%
Star Tribune/Mason-Dixon[211]

Margin of error: ± 5.7%
Sample size: 800

January 18–20, 2016 Hillary Clinton
59%
Bernie Sanders
25%
Martin O'Malley
1%
Undecided 15%
Public Policy Polling[212]

Margin of error: ± 4.9%
Sample size: 426

July 30 – August 2, 2015 Hillary Clinton
50%
Bernie Sanders
32%
Martin O'Malley
4%
Lincoln Chafee 3%, Jim Webb 2%, Not sure 10%
Suffolk University[213]

Margin of error: ± ?
Sample size: 100

April 24–28, 2014 Hillary Clinton
63%
Elizabeth Warren
15%
Joe Biden
4%
Cory Booker 3%, Deval Patrick 2%, Mark Warner 2%, Andrew Cuomo 1%, Undecided 10%
Public Policy Polling[214]

Margin of error: ± 5.1%
Sample size: 373

January 18–20, 2013 Hillary Clinton
59%
Joe Biden
14%
Amy Klobuchar
11%
Elizabeth Warren 4%, Andrew Cuomo 3%, Martin O'Malley 1%, Deval Patrick 0%, Brian Schweitzer 1%, Mark Warner 0%, Someone Else/Undecided 10%
Amy Klobuchar
43%
Andrew Cuomo
14%
Elizabeth Warren
10%
Martin O'Malley 1%, Deval Patrick 1%, Brian Schweitzer 0%, Mark Warner 0%, Someone Else/Undecided 30%

Mississippi

Delegate count: 36 Pledged, 5 Unpledged

Winner
Hillary Clinton
Primary date
March 8, 2016
Poll source Date 1st 2nd Other
Official Primary results March 8, 2016 Hillary Clinton
82.5%
Bernie Sanders
16.6%
Others / Uncommitted
0.9%
Magellan Strategies[215]

Margin of error: ±4.5%
Sample size: 471

February 29, 2016 Hillary Clinton
65%
Bernie Sanders
11%
Others / Undecided
24%
Public Policy Polling[216]

Margin of error: ± 4.3
Sample size: 514

February 14–16, 2016 Hillary Clinton
60%
Bernie Sanders
26%

Missouri

Delegate count: 71 Pledged, 13 Unpledged

Winner
Hillary Clinton
Primary date
March 15, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary results March 15, 2016 Hillary Clinton
49.6%
Bernie Sanders
49.4%
Others / Uncommitted
1.0%
Public Policy Polling[217]

Margin of error: ± 3.4%
Sample size: 839

March 11–12, 2016 Bernie Sanders
47%
Hillary Clinton
46%
Others / Undecided
7%
RABA Research[218]

Margin of error: ± 4%
Sample size: 670

March 8–10, 2016 Hillary Clinton
44%
Bernie Sanders
40%
Others / Undecided
16%
Fort Hayes State University[219]

Margin of error: ± 8%
Sample size: 145

March 3–10, 2016 Hillary Clinton
47%
Bernie Sanders
40%
Others / Undecided 13%
Public Policy Polling[220]

Margin of error: 5.2%
Sample size: 352

August 7–9, 2015 Hillary Clinton
53%
Bernie Sanders
25%
Martin O'Malley
5%
Jim Webb 5%, Lincoln Chafee 1%, Not sure 12%

Montana

Delegate count: 21 Pledged, 6 Unpledged

Winner
Bernie Sanders
Primary date
June 7, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary Results June 7, 2016 Bernie Sanders
51.6%
Hillary Clinton
44.2%
No Preference
4.3%
Gravis Marketing[221]

Margin of error: 3%
Sample size: 1,035

February 24–25, 2015 Hillary Clinton
42.2%
Elizabeth Warren
34.3%
Joe Biden
5.9%
Jim Webb 2.9%, Mark Warner 2%, Martin O'Malley 1%, Unsure 11.8%
Public Policy Polling

Margin of error: ± 5%
Sample size: 381

November 15–17, 2013 Hillary Clinton
47%
Brian Schweitzer
26%
Elizabeth Warren
8%
Joe Biden 6%, Andrew Cuomo 3%, Cory Booker 1%, Martin O'Malley 1%, Kirsten Gillibrand 0%, Mark Warner 0%, Someone Else/Undecided 7%
Public Policy Polling

Margin of error: ± 5.6%
Sample size: 316

June 21–23, 2013 Hillary Clinton
52%
Brian Schweitzer
17%
Joe Biden
9%
Cory Booker 3%, Elizabeth Warren 3%, Andrew Cuomo 1%, Kirsten Gillibrand 1%, Martin O'Malley 0%, Mark Warner 0%, Someone Else/Undecided 13%
Public Policy Polling

Margin of error: ± 5.1%
Sample size: 371

February 15–17, 2013 Hillary Clinton
58%
Brian Schweitzer
22%
Joe Biden
9%
Elizabeth Warren 5%, Andrew Cuomo 3%, Martin O'Malley 1%, Deval Patrick 1%, Kirsten Gillibrand 0%, Mark Warner 0%, Someone Else/Undecided 5%
Brian Schweitzer
35%
Joe Biden
28%
Elizabeth Warren
13%
Mark Warner 5%, Andrew Cuomo 4%, Kirsten Gillibrand 1%, Martin O'Malley 1%, Deval Patrick 0%, Someone Else/Undecided 13%
Brian Schweitzer
46%
Elizabeth Warren
18%
Andrew Cuomo
12%
Mark Warner 3%, Martin O'Malley 2%, Kirsten Gillibrand 1%, Deval Patrick 1%, Someone Else/Undecided 18%

Nebraska

Delegate count: 25 Pledged, 5 Unpledged

Winner
Bernie Sanders
Primary date
March 5, 2016
Poll source Date 1st 2nd 3rd
Caucus results March 5, 2016 Bernie Sanders
57.1%
Hillary Clinton
42.9%

No polls were conducted for the Nebraska Democratic caucuses

Nevada

Delegate count: 35 Pledged, 8 Unpledged

Winner
Hillary Clinton
Caucus date
February 20, 2016
Poll source Date 1st 2nd Other
Caucus results February 20, 2016 Hillary Clinton
52.6%
Bernie Sanders
47.3%
Other
0.1%
Gravis Marketing[222]

Margin of error: ± 4.0
Sample size: 516

February 14–15, 2016 Hillary Clinton
53%
Bernie Sanders
47%
CNN/ORC[223]

Margin of error: ± 6.0
Sample size: 282

February 10–15, 2016 Hillary Clinton
48%
Bernie Sanders
47%
Others / Undecided
6%
Washington Free Beacon/TPC Research[224]

Margin of error: ± 2.9
Sample size: 1,236

February 8–10, 2016 Hillary Clinton
45%
Bernie Sanders
45%
Undecided 9%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
Gravis Marketing

Margin of error: ± 5%
Sample size: 326

December 23–27, 2015 Hillary Clinton
50%
Bernie Sanders
27%
Martin O'Malley
1%
Unsure 16%
CNN/ORC[225]

Margin of error: ± 6%
Sample size: 253

October 3–10, 2015 Hillary Clinton
50%
Bernie Sanders
34%
Joe Biden
12%
Gravis Marketing

Margin of error: ± 5%
Sample size: 416

July 12–13, 2015 Hillary Clinton
55%
Bernie Sanders
18%
Elizabeth Warren
8%
Joe Biden 5%, Lincoln Chafee 1%, Jim Webb 1%, Martin O'Malley 0%, Unsure 12%
Gravis Marketing[226]

Margin of error: ± 6%
Sample size: 324

March 27, 2015 Hillary Clinton
61%
Elizabeth Warren
15%
Bernie Sanders
7%
Joe Biden 3%, Al Gore 3%, Martin O'Malley 1%, Jim Webb 0%, Unsure 10%
Gravis Marketing

Margin of error: ± 6%
Sample size: 324

February 21–22, 2015 Hillary Clinton
58%
Elizabeth Warren
20%
Joe Biden
8%
Bernie Sanders 4%, Jim Webb 3%, Martin O'Malley 0%, Undecided 7%

New Hampshire

Delegate count: 24 Pledged, 8 Unpledged

Winner
Bernie Sanders
Primary date
February 9, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary results February 9, 2016 Bernie Sanders
60.1%
Hillary Clinton
37.7%
Others / Uncommitted
2.2%
American Research Group[227]
Margin of error: ± 5%
Sample size: 408
February 6–7, 2016 Bernie Sanders
53%
Hillary Clinton
41%
Undecided
6%
University of Massachusetts-Lowell/7 News survey[228]
Margin of error: ± 5.38%
Sample size: 428
February 4–6, 2016 Bernie Sanders
57%
Hillary Clinton
40%
Others / Undecided
3%
University of Massachusetts-Lowell/7 News survey[229]
Margin of error: ± 5.3%
Sample size: 442
January 29–31, 2016 Bernie Sanders
61%
Hillary Clinton
30%
Martin O'Malley
1%
Undecided 6%
CNN/WMUR[230]
Margin of error: ± 5.3%
Sample size: 347
January 27–30, 2016 Bernie Sanders
57%
Hillary Clinton
34%
Martin O'Malley
1%
Other, Undecided, or Not Committed 9%
Emerson College[231]

Margin of error ± 5.2%
Sample Size: 350

January 25–26, 2016 Bernie Sanders
52%
Hillary Clinton
44%
Martin O'Malley
3%
Other 1%
American Research Group[232]

Margin of error ± 4%
Sample Size: 396

January 23–25, 2016 Bernie Sanders
49%
Hillary Clinton
42%
Martin O'Malley
3%
Other 6%
Franklin Pierce University/Boston Herald[233]

Margin of error ± 4.9%
Sample Size: 408

January 20–24, 2016 Bernie Sanders
55%
Hillary Clinton
39%
Martin O'Malley
2%
Other 5%
Fox News[234]

Margin of error ± 4.5%
Sample Size: 400

January 18–21, 2016 Bernie Sanders
56%
Hillary Clinton
34%
Martin O'Malley
3%
Other 7%
CBS News/YouGov[235]

Margin of error ± 6.2%
Sample Size:

January 18–21, 2016 Bernie Sanders
57%
Hillary Clinton
38%
Martin O'Malley
5%
No preference 0%
Suffolk University[236]

Margin of error –
Sample Size: 500

January 17–21, 2016 Bernie Sanders
50%
Hillary Clinton
41%
Martin O'Malley
2%
Other/Undecided 7%
American Research Group[237]

Margin of error ± 4%
Sample Size: 600

January 15–18, 2016 Bernie Sanders
49%
Hillary Clinton
43%
Martin O'Malley
3%
Undecided 5%
Gravis Marketing[238]

Margin of error ± 4.5%
Sample Size: 472

January 15–18, 2016 Bernie Sanders
46%
Hillary Clinton
43%
Martin O'Malley
2%
Undecided 8%
CNN and WMUR[239]

Margin of error ± 4.8%
Sample Size: 420

January 13–18, 2016 Bernie Sanders
60%
Hillary Clinton
33%
Martin O'Malley
1%
Undecided 6%
Monmouth University Poll[240]

Margin of error ± 4.8%
Sample Size: 413

January 7–10, 2016 Bernie Sanders
53%
Hillary Clinton
39%
Martin O'Malley
5%
Undecided 3%
Fox News[241]

Margin of error ± 5%
Sample Size: 386

January 4–7, 2016 Bernie Sanders
50%
Hillary Clinton
37%
Martin O'Malley
3%
Other 2%, None of the above 5%, Don't know 3%
NBC News/WSJ/Marist

Margin of error: ± 4.8% Sample size: 425

January 2–7, 2016 Bernie Sanders
50%
Hillary Clinton
46%
Martin O'Malley
1%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
American Research Group[237]

Margin of error ± 4%
Sample Size: 600

December 20–22, 2015 Hillary Clinton
46%
Bernie Sanders
43%
Martin O'Malley
3%
Other <0.5%, Undecided 7%
YouGov/CBS News[242]

Margin of error ± 5.7%
Sample Size: 1091

December 14–17, 2015 Bernie Sanders
56%
Hillary Clinton
42%
Martin O'Malley
1%
No preference 1%
Boston Herald[243]

Margin of error ± 4.8%
Sample Size: 410

December 13–17, 2015 Bernie Sanders
48%
Hillary Clinton
46%
Martin O'Malley
2%
Undecided 4%
CNN and WMUR[244]

Margin of error: ± 5.1%
Sample size: 370

November 30 – December 7, 2015 Bernie Sanders
50%
Hillary Clinton
40%
Martin O'Malley
1%
Someone Else/Not Sure 6%
Public Policy Polling[245]

Margin of error: ± 4.6%
Sample size: 458

November 30 – December 2, 2015 Hillary Clinton
44%
Bernie Sanders
42%
Martin O'Malley
8%
Someone Else/Not Sure 7%
YouGov/CBS News[139]

Margin of error: ± 5.2%
Sample size: 561

November 15–19, 2015 Bernie Sanders
52%
Hillary Clinton
45%
Martin O'Malley 3% Undecided 0%
Fox News[246]

Margin of error: ± 3.5%
Sample size: 804

November 15–17, 2015 Bernie Sanders
45%
Hillary Clinton
44%
Martin O'Malley 5% None 1%, Don't Know 5%
Gravis Marketing[247]

Margin of error: ± 6.7%
Sample size: 214

November 11, 2015 Hillary Clinton
46%
Bernie Sanders
25%
Martin O'Malley
3%
Unsure 26%
Monmouth University Polling Institute[248]

Margin of error: ± 4.9%
Sample size: 403

October 29 – November 1, 2015 Hillary Clinton
48%
Bernie Sanders
45%
Martin O'Malley
3%
Lawrence Lessig 1%
YouGov/CBS News[249]

Margin of error: ± 7.1%
Sample size: 499

October 15–22, 2015 Bernie Sanders
54%
Hillary Clinton
39%
Martin O'Malley 3% Lincoln Chafee 0%, Lawrence Lessig 0%, No preference 3%
Public Policy Polling

Margin of error: ± 4.9%
Sample size: 393

October 16–18, 2015 Hillary Clinton
41%
Bernie Sanders
33%
Joe Biden
11%
Martin O'Malley 4%, Lincoln Chafee 2%, Jim Webb 2%, Lawrence Lessig 0%, Not Sure 7%
Bloomberg/San Anselm Poll[250]

Margin of error: ± 4.9%
Sample size: 400

October 15–18, 2015 Bernie Sanders
41%
Hillary Clinton
36%
Joe Biden
10%
Jim Webb 1%, Lawrence Lessig 1%, Someone Else 1%, None of the Above 2%, Not Sure 8%
Franklin Pierce-Herald[251]

Margin of error: ± 4.9%
Sample size: 403

October 14–17, 2015 Bernie Sanders
38%
Hillary Clinton
30%
Joe Biden
19%
Jim Webb 1%, Martin O'Malley 1%, Lincoln Chafee 1%
Boston Globe/Suffolk University[252]

Margin of error: ± 4.4%
Sample size: 500

October 14–15, 2015 Hillary Clinton
36.8%
Bernie Sanders
35.4%
Joe Biden
11.2%
Jim Webb 2.6%, Martin O'Malley 1.4%, Lincoln Chafee 0.6%, Lawrence Lessig 0.2%, Undecided 11.6%
Gravis Marketing[253]

Margin of error: ± 5.1%
Sample size: 373

October 5–6, 2015 Bernie Sanders
32.8%
Hillary Clinton
30.2%
Joe Biden
10.6%
Martin O'Malley 1.5%, Jim Webb 0.7%, Lincoln Chafee 0.8%, Undecided 23.3%
NBC News/WSJ/Marist[254]

Margin of error: ± 4.9%
Sample size: 404

September 23–30, 2015 Bernie Sanders
42%
Hillary Clinton
28%
Joe Biden
18%
Martin O'Malley 2%, Jim Webb 1%, Lincoln Chafee 1%, Undecided 9%
Bernie Sanders
48%
Hillary Clinton
39%
Lincoln Chafee 2% Martin O'Malley 2%, Jim Webb 1%, Undecided 9%
UNH/WMUR[255]

Margin of error: ± 5.5%
Sample size: 314

September 17–23, 2015 Bernie Sanders
46%
Hillary Clinton
30%
Joe Biden
14%
Martin O'Malley 2%, Jim Webb 1%, Lincoln Chafee 0%, Someone else 1%, Don't Know Yet 6%
MassINC/WBUR/NPR[256]

Margin of error: ± 4.9%
Sample size: 404

September 12–15, 2015 Bernie Sanders
35%
Hillary Clinton
31%
Joe Biden
14%
Jim Webb 2%, Martin O'Malley 1%, Lincoln Chafee 1%, Did not know/refused 10%, Some other candidate 4%, Would not vote 2%
Monmouth University[257]

Margin of error: ± 4.9%
Sample size: 400

September 10–13, 2015 Bernie Sanders
43%
Hillary Clinton
36%
Joe Biden
13%
Martin O'Malley 2%, Lincoln Chafee 1%, Jim Webb 1%, Lawrence Lessig 1%, other 1%, undecided 3%
YouGov/CBS News[258]

Margin of error: ± 7.4%
Sample size: 548

September 3–10, 2015 Bernie Sanders
52%
Hillary Clinton
30%
Joe Biden
9%
Martin O'Malley 1%, Lincoln Chafee 0%, Jim Webb 0%, No preference 8%
NBC News/Marist Poll[259]

Margin of error: ± 5.2%
Sample size: 356

Published September 6, 2015 Bernie Sanders
41%
Hillary Clinton
32%
Joe Biden
16%
Jim Webb 1%, Martin O'Malley 1%, Lincoln Chafee <1%, Undecided 8%
Bernie Sanders
49%
Hillary Clinton
38%
Jim Webb
2%
Lincoln Chafee 1%, Martin O'Malley 1%, Undecided 8%
Public Policy Polling[260]

Margin of error: ± 5.1%
Sample size: 370

August 21–24, 2015 Bernie Sanders
42%
Hillary Clinton
35%
Jim Webb
6%
Martin O'Malley 4%, Lincoln Chafee 2%, Lawrence Lessig 1%, Not sure 10%
Franklin Pierce University/Boston Herald[261]

Margin of error: ± 4.7%
Sample size: 442

August 7–10, 2015 Bernie Sanders
44%
Hillary Clinton
37%
Joe Biden
9%
Jim Webb 1%, Martin O'Malley <1%, Lincoln Chafee <1%, Other/Not sure 9%
Gravis Marketing/One
America News[262]

Margin of error: ± 4.5%
Sample size: 475

July 31 – August 3, 2015 Hillary Clinton
43%
Bernie Sanders
39%
Elizabeth Warren
8%
Joe Biden 6%, Martin O'Malley 2%, Jim Webb 2%, Lincoln Chafee 0%
UNH/WMUR[263]

Margin of error: ± 5.9%
Sample size: 276

July 22–30, 2015 Hillary Clinton
42%
Bernie Sanders
36%
Joe Biden
5%
Martin O'Malley 1%, Jim Webb 1%, Lincoln Chafee 0%, Someone else 3%, Don't Know Yet 12%
NBC News/Marist[264]

Margin of error: ± 5.4%
Sample size: 329

July 14–21, 2015 Hillary Clinton
42%
Bernie Sanders
32%
Joe Biden
12%
Martin O'Malley 3%, Lincoln Chafee 2%, Jim Webb 1%, Undecided 10%
CNN/WMUR[265]

Margin of error: ± 5.2%
Sample size: 360

June 18–24, 2015 Hillary Clinton
43%
Bernie Sanders
35%
Joe Biden
8%
Martin O'Malley 2%, Jim Webb 1%, Lincoln Chafee 0%, Someone else 2%, Not sure 9%
Bloomberg/Saint Anselm

Margin of error: ± 4.9%
Sample size: 400

June 19–22, 2015 Hillary Clinton
56%
Bernie Sanders
24%
Martin O'Malley
2%
Lincoln Chafee 1%, None of the above 4%, Not sure 12%
Suffolk

Margin of error: ± 4.4%
Sample size: 500

June 11–15, 2015 Hillary Clinton
41%
Bernie Sanders
31%
Joe Biden
7%
Martin O'Malley 3%, Lincoln Chafee 1%, Jim Webb 1%, Other 0%, Undecided 15%
Morning Consult

Margin of error: ± 6%
Sample size: 279

May 31 – June 8, 2015 Hillary Clinton
44%
Bernie Sanders
32%
Joe Biden
8%
Martin O'Malley 2%, Jim Webb 1%, Lincoln Chafee 0%, Someone else 0%, Don't know/no opinion 11%
Purple Strategies

Margin of error: ± 4.9%
Sample size: 400

May 2–6, 2015 Hillary Clinton
62%
Bernie Sanders
18%
Joe Biden
5%
Martin O'Malley 3%, Lincoln Chafee 1%, Jim Webb 1%, Someone else 0%, None of the above 3%, Not sure 8%
UNH/WMUR

Margin of error: ± 6.5%
Sample size: 229

April 24 – May 3, 2015 Hillary Clinton
51%
Elizabeth Warren
20%
Bernie Sanders
13%
Andrew Cuomo 3%, Joe Biden 2%, Lincoln Chafee 1%, Martin O'Malley 1%, Jim Webb 1%, Undecided 8%
Gravis Marketing

Margin of error: ± 5%
Sample size: 369

April 21–22, 2015 Hillary Clinton
45%
Elizabeth Warren
24%
Bernie Sanders
12%
Joe Biden 7%, Martin O'Malley 4%, Lincoln Chafee 2%, Jim Webb 2%, Bill de Blasio 0.4%, Undecided 5%
Hillary Clinton
54%
Bernie Sanders
19%
Joe Biden
10%
Martin O'Malley 5%, Jim Webb 4%, Lincoln Chafee 2%, Bill de Blasio 1%, Undecided 6%
Public Policy Polling

Margin of error: ± 5.4%
Sample size: 329

April 9–13, 2015 Hillary Clinton
45%
Elizabeth Warren
23%
Bernie Sanders
12%
Joe Biden 7%, Martin O'Malley 3%, Lincoln Chafee 1%, Jim Webb 1%, Other/Undecided 9%
Franklin Pierce University/Boston Herald

Margin of error: ± 4.7%
Sample size: 417

March 22–25, 2015 Hillary Clinton
47%
Elizabeth Warren
22%
Joe Biden
10%
Bernie Sanders 8%, Andrew Cuomo 4%, Martin O'Malley 1%, Jim Webb <1%, Other 3%, Unsure 5%
Hillary Clinton
41%
Elizabeth Warren
20%
Al Gore
16%
Joe Biden 7%, Bernie Sanders 6%, Andrew Cuomo 1%, Martin O'Malley <1%, Jim Webb <1%, Other 2%, Unsure 6%
Gravis Marketing

Margin of error: ± 5%
Sample size: 427

March 18–19, 2015 Hillary Clinton
49%
Elizabeth Warren
20%
Bernie Sanders
12%
Joe Biden 5%, Martin O'Malley 2%, Jim Webb 2%, Unsure 10%
NBC News/Marist

Margin of error: ± 5.6%
Sample size: 309

February 3–10, 2015 Hillary Clinton
69%
Bernie Sanders
13%
Joe Biden
8%
Jim Webb 2%, Martin O'Malley <1%, Undecided 7%
Purple Strategies

Margin of error: ± 4.9%
Sample size: 400

January 31 – February 5, 2015 Hillary Clinton
56%
Elizabeth Warren
15%
Joe Biden
8%
Bernie Sanders 8%, Martin O'Malley 0%, Jim Webb 0%, Someone else 0%, None of the above 2%, Not sure 11%
Gravis Marketing

Margin of error: ± 5%
Sample size: 384

February 2–3, 2015 Hillary Clinton
44%
Elizabeth Warren
25%
Bernie Sanders
13%
Joe Biden 5%, Martin O'Malley 1%, Jim Webb 1%, Unsure 10%
UNH/WMUR

Margin of error: ± 5.7%
Sample size: 297

January 22 – February 3, 2015 Hillary Clinton
58%
Elizabeth Warren
14%
Joe Biden
8%
Bernie Sanders 6%, Andrew Cuomo 2%, Martin O'Malley 1%, Jim Webb 1%, Someone else 1%, Don't know yet 9%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
Purple Insights

Margin of error: ± 4.9%
Sample size: 404

November 12–18, 2014 Hillary Clinton
62%
Elizabeth Warren
13%
Bernie Sanders
6%
Joe Biden 5%, Deval Patrick 2%, Martin O'Malley 1%, Someone else 0%, None of the above 2%, Not sure 8%
New England College

Margin of error: ± 4.06%
Sample size: 583

October 31 – November 1, 2014 Hillary Clinton
53.1%
Elizabeth Warren
16.8%
Bernie Sanders
7%
Joe Biden 5.8%, Martin O'Malley 2.3%, Deval Patrick 1.4%, Andrew Cuomo 1.2%, Kirsten Gillibrand 1.2%, Mark Warner 1.2%, Other 10%
UMass Amherst

Margin of error: ± ?
Sample size: 204

October 10–15, 2014 Hillary Clinton
49%
Elizabeth Warren
16%
Bernie Sanders
11%
Joe Biden 6%, Andrew Cuomo 3%, Deval Patrick 3%, Martin O'Malley <1%, Cory Booker <1%, Other 11%
WMUR/UNH

Margin of error: ± 5.9%
Sample size: 275

September 29 – October 5, 2014 Hillary Clinton
58%
Elizabeth Warren
18%
Joe Biden
3%
Martin O'Malley 3%, Bernie Sanders 3%, Andrew Cuomo 1%, Mark Warner <1%, Other 1%, Undecided 13%
CNN/ORC

Margin of error: ± 5.5%
Sample size: 334

September 8–11, 2014 Hillary Clinton
60%
Elizabeth Warren
11%
Joe Biden
8%
Bernie Sanders 7%, Deval Patrick 4%, Andrew Cuomo 1%, Martin O'Malley 1%, Other 1%, None/No one 2%, No opinion 6%
NBC News/Marist

Margin of error: ± 4.5%
Sample size: 479

July 7–13, 2014 Hillary Clinton
74%
Joe Biden
18%
Undecided 8%
WMUR/UNH

Margin of error: ± 6.1%
Sample size: 257

June 19 – July 1, 2014 Hillary Clinton
59%
Joe Biden
14%
Elizabeth Warren
8%
Bernie Sanders 5%, Andrew Cuomo 3%, Mark Warner 1%, Martin O'Malley 0%, Brian Schweitzer 0%, Other 1%, Undecided 9%
WMUR/UNH

Margin of error: ± 7.2%
Sample size: 184

April 1–9, 2014 Hillary Clinton
65%
Joe Biden
6%
Andrew Cuomo
4%
Mark Warner 2%, Martin O'Malley 0%, Brian Schweitzer 0%, Other 5%, Undecided 18%
WMUR/UNH

Margin of error: ± 6.2%
Sample size: 252

January 21–26, 2014 Hillary Clinton
74%
Joe Biden
10%
Andrew Cuomo
2%
Mark Warner 1%, Martin O'Malley <1%, Brian Schweitzer <1%, Kirsten Gillibrand 0%, Other 2%, Undecided 10%
Purple Strategies

Margin of error: ± 5.4%
Sample size: 334

January 21–23, 2014 Hillary Clinton
68%
Elizabeth Warren
13%
Joe Biden
6%
Deval Patrick 2%, Martin O'Malley 1%, Other 2%, None 1%, Undecided 5%
Public Policy Polling

Margin of error: ± 4.4%
Sample size: 502

January 9–12, 2014 Hillary Clinton
65%
Joe Biden
10%
Elizabeth Warren
8%
Andrew Cuomo 3%, Cory Booker 2%, Kirsten Gillibrand 1%, Martin O'Malley 1%, Brian Schweitzer 0%, Mark Warner 0%, Someone else/Not sure 9%
Joe Biden
32%
Elizabeth Warren
21%
Andrew Cuomo
9%
Cory Booker 4%, Kirsten Gillibrand 4%, Martin O'Malley 2%, Brian Schweitzer 1%, Mark Warner 1%, Someone else/Not sure 26%
Elizabeth Warren
30%
Andrew Cuomo
19%
Cory Booker
9%
Martin O'Malley 5%, Kirsten Gillibrand 4%, Brian Schweitzer 2%, Mark Warner 2%, Someone else/Not sure 28%
Polls in 2013
Poll source Date 1st 2nd 3rd Other
WMUR/UNH

Margin of error: ± 6.2%
Sample size: 252

October 7–16, 2013 Hillary Clinton
64%
Joe Biden
6%
Elizabeth Warren
6%
Andrew Cuomo 2%, Deval Patrick 1%, Evan Bayh <1%, Cory Booker <1%, Martin O'Malley <1%, Mark Warner <1%, Kirsten Gillibrand 0%, John Hickenlooper 0%, Other 2%, Unsure 18%
Public Policy Polling

Margin of error: ± 4.6%
Sample size: 455

September 13–16, 2013 Hillary Clinton
57%
Joe Biden
12%
Elizabeth Warren
11%
Cory Booker 4%, Andrew Cuomo 2%, Kirsten Gillibrand 1%, Mark Warner 1%, Martin O'Malley 0%, Brian Schweitzer 0%, Someone else/Not sure 11%
Joe Biden
36%
Elizabeth Warren
20%
Cory Booker
9%
Andrew Cuomo 7%, Kirsten Gillibrand 1%, Martin O'Malley 1%, Brian Schweitzer 1%, Mark Warner 1%, Someone else/Not sure 23%
Elizabeth Warren
33%
Andrew Cuomo
14%
Cory Booker
12%
Kirsten Gillibrand 5%, Martin O'Malley 4%, Mark Warner 2%, Brian Schweitzer 1%, Someone else/Not sure 30%
WMUR/UNH

Margin of error: ± 7.1%
Sample size: 190

July 18–29, 2013 Hillary Clinton
62%
Joe Biden
8%
Deval Patrick
5%
Cory Booker 2%, Andrew Cuomo 1%, Evan Bayh <1%, Kirsten Gillibrand <1%, John Hickenlooper <1%, Martin O'Malley 0%, Mark Warner 0%, Other 2%, Unsure 19%
New England College

Margin of error: ± 5.37%
Sample size: 333

July, 2013 Hillary Clinton
65%
Joe Biden
8%
Jeanne Shaheen
6%
Andrew Cuomo 1.5%, Martin O'Malley 0.6%, Unsure 19%
New England College

Margin of error: ± 5.5%
Sample size: 314

May, 2013 Hillary Clinton
65%
Joe Biden
10%
Elizabeth Warren
5%
Andrew Cuomo 4%, Deval Patrick 3%, Martin O'Malley 0%, Unsure 13%
Public Policy Polling

Margin of error: ± 5.1%
Sample size: 368

April 19–21, 2013 Hillary Clinton
68%
Joe Biden
12%
Elizabeth Warren
5%
Andrew Cuomo 3%, Deval Patrick 2%, Kirsten Gillibrand 1%, Martin O'Malley 1%, Brian Schweitzer 0%, Mark Warner 0%, Someone Else/Undecided 9%
Joe Biden
44%
Elizabeth Warren
12%
Andrew Cuomo
9%
Deval Patrick 9%, Kirsten Gillibrand 2%, Martin O'Malley 1%, Brian Schweitzer 1%, Mark Warner 1%, Someone Else/Undecided 21%
Andrew Cuomo
23%
Elizabeth Warren
22%
Deval Patrick
17%
Kirsten Gillibrand 4%, Martin O'Malley 2%, Brian Schweitzer 1%, Mark Warner 1%, Someone Else/Undecided 30%
WMUR/UNH

Margin of error: ± 7.1%
Sample size: 188

April 4–9, 2013 Hillary Clinton
61%
Joe Biden
7%
Andrew Cuomo
3%
Deval Patrick 3%, Mark Warner 2%, Evan Bayh 1%, Cory Booker 1%, John Hickenlooper 0%, Martin O'Malley 0%, Brian Schweitzer 0%, Antonio Villaraigosa 0%, Someone Else 2%, Undecided 22%
WMUR/UNH

Margin of error: ± 7%
Sample size: 201

Jan. 30–Feb. 5, 2013 Hillary Clinton
63%
Joe Biden
10%
Andrew Cuomo
5%
Cory Booker 2%, Evan Bayh 1%, Deval Patrick 1%, Brian Schweitzer 1%, John Hickenlooper <1%, Martin O'Malley <1%, Antonio Villaraigosa <1%, Mark Warner <1%, Someone Else 1%, Undecided 16%

New Jersey

Delegate count: 126 Pledged, 16 Unpledged

Winner
Hillary Clinton
Primary date
June 7, 2016
Poll source Date 1st 2nd Other
Official Primary results June 7, 2016 Hillary Clinton
63.3%
Bernie Sanders
36.7%
CBS/YouGov[266]

Margin of error: ± 5.4%
Sample size: 586

May 31 –
June 3, 2016
Hillary Clinton
61%
Bernie Sanders
34%
Others / Undecided
5%
American Research Group[267]

Margin of error: ± -%
Sample size: 400

May 31 –
June 2, 2016
Hillary Clinton
60%
Bernie Sanders
37%
Others / Undecided
3%
Quinnipiac[268]

Margin of error: ± 3.7%
Sample size: 696

May 10-16, 2016 Hillary Clinton
54%
Bernie Sanders
40%
Others / Undecided
6%
Monmouth University[269]

Margin of error: ± 5.7%
Sample size: 301

May 1-3, 2016 Hillary Clinton
60%
Bernie Sanders
32%
Others / Undecided
8%
Rutgers-Eagleton Poll[270]

Margin of error: ± 6.3%
Sample Size: 292

April 1-8, 2016 Hillary Clinton
51%
Bernie Sanders
42%
Others / Undecided
7%
Rutgers-Eagleton Poll[271]

Margin of error: ± 6.2%
Sample Size: 304

February 6–15, 2016 Hillary Clinton
55%
Bernie Sanders
32%
Others / Undecided
13%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
Rutgers-Eagleton Poll[272]

Margin of error: ± ?%
Sample Size: 304

November 30 – December 6, 2015 Hillary Clinton
60%
Bernie Sanders
19%
Martin O'Malley 1% Other 3%, Don't know 17%
Farleigh Dickenson University[273]

Margin of error: ± 3.9%
Sample Size: 830

November 9–15, 2015 Hillary Clinton
64%
Bernie Sanders
27%
Martin O'Malley 2% DK/Refused 3%, Wouldn't Vote 3%, Other 1%
Rutgers-Eagleton Poll[274]

Margin of error: ± 5.7%
Sample size: 367

October 3–10, 2015 Hillary Clinton
49%
Bernie Sanders
19%
Joe Biden
10%
Other 3%, Don't know 20%
Fairleigh Dickinson University[275]

Margin of error: ± 5.5%
Sample size: 345

June 15–21, 2015 Hillary Clinton
63%
Bernie Sanders
15%
Martin O'Malley
3%
Lincoln Chafee 0%, Other 1%, Wouldn't vote 3%, DK/Refused 14%
Fairleigh Dickinson University

Margin of error: ± 5.5%
Sample size: 323

April 13–19, 2015 Hillary Clinton
62%
Another Democratic candidate 9%, Don't know 27%, Refused 1%
Quinnipiac University

Margin of error: ± 4.2%
Sample size: 539

April 9–14, 2015 Hillary Clinton
63%
Elizabeth Warren
12%
Joe Biden
10%
Bernie Sanders 3%, Martin O'Malley 1%, Jim Webb 1%, Lincoln Chafee 0%, Other 1%, Wouldn't vote 3%, Don't know 7%
Joe Biden
36%
Elizabeth Warren
28%
Bernie Sanders
6%
Martin O'Malley 3%, Jim Webb 1%, Lincoln Chafee 0%, Other 1%, Wouldn't vote 4%, Don't know 21%
Quinnipiac University

Margin of error: ± ?
Sample size: ?

January 15–19, 2015 Hillary Clinton
65%
Elizabeth Warren
11%
Joe Biden
7%
Bernie Sanders 3%, Jim Webb 1%, Martin O'Malley 0%, Other 1%, Wouldn't vote 3%, Don't know 11%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
Rutgers-Eagleton

Margin of error: ± ?
Sample size: 280

December 3–10, 2014 Hillary Clinton
54%
Elizabeth Warren
6%
Cory Booker
2%
Joe Biden 1%, Martin O'Malley 1%, Other 3%, Don't know 34%
Rutgers-Eagleton

Margin of error: ± ?
Sample size: 331

July 28 – August 5, 2014 Hillary Clinton
59%
Joe Biden
3%
Elizabeth Warren
3%
Cory Booker 2%, Other 4%, Don't know 30%
Polls in 2013
Poll source Date 1st 2nd 3rd Other
Fairleigh Dickinson University

Margin of error: ± 5.3%
Sample size: 337

August 21–27, 2013 Hillary Clinton
63%
Joe Biden
10%
Andrew Cuomo
6%
Elizabeth Warren 4%, Other 4%, Undecided 13%
Kean University

Margin of error: ± ?%
Sample size: 420

April 25–29, 2013 Hillary Clinton
67%
Joe Biden
13%
Andrew Cuomo
8%
Martin O'Malley 2%, Other 4%, Undecided 6%

New Mexico

Delegate count: 34 Pledged, 9 Unpledged

Winner
Hillary Clinton
Primary date
June 7, 2016
Poll source Date 1st 2nd Other
Official Primary Results June 7, 2016 Hillary Clinton
51.5%
Bernie Sanders
48.5%
BWD Global[276]

Margin of error: ± 2.5%
Sample size: 1,455

May 25-26, 2016 Hillary Clinton
53%
Bernie Sanders
28%
Others / Undecided
19%
Albuquerque Journal[277]

Margin of error: ± 4.9%
Sample size: 401

February 23–25, 2016 Hillary Clinton
47%
Bernie Sanders
33%
Others / Undecided
20%

New York

Delegate count: 247 Pledged, 44 Unpledged

Winner
Hillary Clinton
Primary date
April 19, 2016
Poll source Date 1st 2nd Other
Primary results April 19, 2016 Hillary Clinton
57.5%
Bernie Sanders
41.6%
Void / Blank Votes
0.9%
Emerson College[278]

Margin of error: ± 4.6%
Sample size: 438

April 15-17, 2016 Hillary Clinton
55%
Bernie Sanders
40%
Others / Undecided
5%
CBS News/YouGov[279]

Margin of error: ± 4.4%
Sample size: 1,033

April 13-15, 2016 Hillary Clinton
53%
Bernie Sanders
43%
Others / Undecided
4%
NBC/WSJ/Marist[280]

Margin of error: ± 4.0%
Sample size: 591

April 10-13, 2016 Hillary Clinton
57%
Bernie Sanders
40%
Others / Undecided
3%
Quinnipiac[281]

Margin of error: ± 3.3%
Sample size: 860

April 6-11, 2016 Hillary Clinton
53%
Bernie Sanders
40%
Others / Undecided
7%
Gravis Marketing/
One America News[282]

Margin of error: ± 2.9%
Sample size: 1,134

April 5–6, 2016 Hillary Clinton
53%
Bernie Sanders
47%
Siena College[283]

Margin of error: ± 4.5%
Sample size: 538

April 6-11, 2016 Hillary Clinton
52%
Bernie Sanders
42%
Others / Undecided
6%
Monmouth[284]

Margin of error: ± 5.6%
Sample size: 302

April 8-10, 2016 Hillary Clinton
51%
Bernie Sanders
39%
Others / Undecided
10%
PPP[285]

Margin of error: ± 3.8%
Sample size: 663

April 7-10, 2016 Hillary Clinton
51%
Bernie Sanders
40%
Others / Undecided
9%
NBC News/WSJ/Marist[286]

Margin of error: ± 4.2%
Sample size: 557

April 6-10, 2016 Hillary Clinton
55%
Bernie Sanders
41%
Others / Undecided
4%
NY1/Baruch[287]

Margin of error: ± 4.2%
Sample size: 632

April 5-10, 2016 Hillary Clinton
50%
Bernie Sanders
37%
Others / Undecided
13%
Emerson College[288]

Margin of error: ± 5.4%
Sample size: 324

April 6-7, 2016 Hillary Clinton
56%
Bernie Sanders
38%
Others / Undecided
6%
FOX News[289]

Margin of error: ± 3.5%
Sample size: 801

April 4-7, 2016 Hillary Clinton
53%
Bernie Sanders
37%
Others / Undecided
10%
CBS News/YouGov[290]

Margin of error: ± 3.4%
Sample size: 718

March 29- April 1, 2016 Hillary Clinton
53%
Bernie Sanders
43%
Others / Undecided
4%
Quinnipiac[291]

Margin of error: ± 3.7%
Sample size: 693

March 22-29, 2016 Hillary Clinton
54%
Bernie Sanders
42%
Others / Undecided
4%
Emerson College[292]

Margin of error: ± 5.0%
Sample size: 373

March 14-16, 2016 Hillary Clinton
71%
Bernie Sanders
23%
Others / Undecided
6%
Siena College

Margin of error: ± 6.2%
Sample size: 368

February 28–March 3, 2016 Hillary Clinton
55%
Bernie Sanders
34%
Others / Undecided
11%
Siena College

Margin of error: ± 5.6%
Sample size: 434

January 31 – February 3, 2016 Hillary Clinton
55%
Bernie Sanders
34%
Others / Undecided
11%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
Siena College

Margin of error: ± 5%
Sample size: 374

September 14–17, 2015 Hillary Clinton
45%
Joe Biden
24%
Bernie Sanders
23%
None of them 4%, Don't know/No opinion 3%
Quinnipiac University[293]

Margin of error: ± 4.4%
Sample size: 508

May 28 – June 1, 2015 Hillary Clinton
55%
Bernie Sanders
15%
Joe Biden
9%
Martin O'Malley 2%, Jim Webb 2%, Lincoln Chafee 1%, Someone else 2%, Wouldn't vote 2%, Undecided 13%
Siena College

Margin of error: ± 6.3%
Sample size: ?

April 19–23, 2015 Hillary Clinton
69%
Someone else 22%
Quinnipiac University

Margin of error: ± 4.3%
Sample size: 521

March 11–16, 2015 Hillary Clinton
51%
Elizabeth Warren
11%
Joe Biden
8%
Andrew Cuomo 7%, Bernie Sanders 5%, Martin O'Malley 1%, Jim Webb 1%, Other 0%, Wouldn't vote 3%, Undecided 12%
Polls in 2013
Poll source Date 1st 2nd 3rd Other
Marist College

Margin of error: ± 5.7%
Sample size: 294

November 18–20, 2013 Hillary Clinton
64%
Andrew Cuomo
14%
Joe Biden
8%
Elizabeth Warren 6%, Martin O'Malley 3%, Undecided 5%

North Carolina

Delegate count: 107 Pledged, 14 Unpledged

Winner
Hillary Clinton
Primary date
March 15, 2016
Poll source Date 1st 2nd 3rd Other
Primary results March 15, 2016 Hillary Clinton
54.5%
Bernie Sanders
40.9%
Others / Uncommitted
4.6%
Public Policy Polling[294]

Margin of error: ± 3.6%
Sample size: 747

March 11–13, 2016 Hillary Clinton
56%
Bernie Sanders
37%
Others / Undecided
7%
High Point University/SurveyUSA[295]

Margin of error: ± 3.8%
Sample size: 669

March 9–10, 2016 Hillary Clinton
58%
Bernie Sanders
34%
Others / Undecided
8%
WRAL/SurveyUSA[296]

Margin of error: ± 3.8%
Sample size: 687

March 4–7, 2016 Hillary Clinton
57%
Bernie Sanders
34%
Others / Undecided
9%
Civitas[297]

Margin of error: ± 4.4%
Sample size: 500

March 3-7, 2016 Hillary Clinton
57%
Bernie Sanders
28%
Others / Undecided
15%
Elon University[298]

Margin of error: ± 3.6%
Sample size: 728

February 15–17, 2016 Hillary Clinton
47%
Bernie Sanders
37%
Others / Undecided 16%
SurveyUSA[299]

Margin of error: ± 4.7%
Sample size: 449

February 14–16, 2016 Hillary Clinton
51%
Bernie Sanders
36%
No Preference 4%, Undecided 9%
Public Policy Polling[300]

Margin of error: ± 4.1
Sample size: 575

February 14–16, 2016 Hillary Clinton
52%
Bernie Sanders
35%
Others / Undecided
13%
High Point[301]

Margin of error: ± 4.5%
Sample size: 478

January 30 – February 4, 2016 Hillary Clinton
55%
Bernie Sanders
29%
Martin O'Malley
1%
Not Sure 15%
Public Policy Polling[302]

Margin of error: ± 4.6%
Sample size: 461

January 18–19, 2016 Hillary Clinton
59%
Bernie Sanders
26%
Martin O'Malley
5%
Not Sure 10%
Civitas[303]

Margin of error: ± 4.4%
Sample size: 500

January 13–16, 2016 Hillary Clinton
53%
Bernie Sanders
28%
Martin O'Malley
2%
Undecided 17%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
Public Policy Polling[304]

Margin of error: ± 2.8%
Sample size: 555

December 5–7, 2015 Hillary Clinton
60%
Bernie Sanders
21%
Martin O'Malley
10%
Not Sure 9%
Elon University[305]

Margin of error: ± 4.32%
Sample size: 514

October 29 – November 2, 2015 Hillary Clinton
57%
Bernie Sanders
24%
Martin O'Malley
3%
Other 2% Undecided/DK 13% Refused 0.5%
Public Policy Polling[306]

Margin of error: ± 4.8%
Sample size: 421

October 23–25, 2015 Hillary Clinton
61%
Bernie Sanders
24%
Martin O'Malley
5%
Lawrence Lessig
2%
Public Policy Polling[307]

Margin of error: ± 4.0%
Sample size: 605

September 24–27, 2015 Hillary Clinton
37%
Joe Biden
30%
Bernie
Sanders
17%
Jim Webb 3%, Lincoln Chafee 2%, Martin O'Malley 1%, Lawrence Lessig 0%, Not sure 10%
Elon University[308]

Margin of error: ± 5%
Sample size: 427

September 17–21, 2015 Hillary Clinton
53.40%
Bernie Sanders
23.00%
Jim Webb
1.60%
Lincoln Chafee 0.70%, Lawrence Lessig 0.70%, Martin O'Malley 0.20%, Other 2.10%, Undecided/Don't know 17.10%, Refuse 1.20%
Public Policy Polling[309]

Margin of error: ± 4.5%
Sample size: 477

August 12–16, 2015 Hillary Clinton
55%
Bernie Sanders
19%
Jim Webb
5%
Lincoln Chafee 2%, Martin O'Malley 2%, Lawrence Lessig 1%
Public Policy Polling[310]

Margin of error: ± 5.8%
Sample size: 286

July 2–6, 2015 Hillary Clinton
55%
Bernie Sanders
20%
Jim Webb
7%
Lincoln Chafee 4%, Martin O'Malley 4%, Someone else/Undecided 11%
Public Policy Polling

Margin of error: ± 5.9%
Sample size: 274

May 28–31, 2015 Hillary Clinton
62%
Bernie Sanders
14%
Jim Webb
5%
Lincoln Chafee 4%, Martin O'Malley 4%, Someone else/Undecided 12%
Survey USA

Margin of error: ± 4.7%
Sample size: 442

April 22–27, 2015 Hillary Clinton
56%
Elizabeth Warren
11%
Joe Biden
8%
Martin O'Malley 3%, Bernie Sanders 3%, Jim Webb 3%, Other/Undecided 16%
Public Policy Polling

Margin of error: ± 5.1%
Sample size: 370

April 2–5, 2015 Hillary Clinton
53%
Joe Biden
13%
Elizabeth Warren
11%
Martin O'Malley 5%, Jim Webb 3%, Bernie Sanders 2%, Someone else/Undecided 12%
Civitas Institute

Margin of error: ± 5%
Sample size: 400

March 20–23, 2015 Hillary Clinton
53%
Elizabeth Warren
19%
Joe Biden
9%
Bernie Sanders 5%, Martin O'Malley 2%, Other/Undecided 13%
Public Policy Polling

Margin of error: ± 4.9%
Sample size: 401

February 24–26, 2015 Hillary Clinton
56%
Elizabeth Warren
13%
Joe Biden
11%
Martin O'Malley 3%, Jim Webb 3%, Bernie Sanders 1%, Someone else/Undecided 12%
Public Policy Polling

Margin of error: ± 5%
Sample size: 385

January 29–31, 2015 Hillary Clinton
54%
Joe Biden
18%
Elizabeth Warren
12%
Bernie Sanders 3%, Martin O'Malley 2%, Jim Webb 2%, Someone else/Not sure 10%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
Public Policy Polling

Margin of error: ± 5%
Sample size: 381

December 4–7, 2014 Hillary Clinton
52%
Joe Biden
18%
Elizabeth Warren
7%
Bernie Sanders 5%, Andrew Cuomo 4%, Jim Webb 2%, Martin O'Malley 1%, Brian Schweitzer 0%, Someone else/Not sure 10%
Suffolk

Margin of error: ± ?%
Sample size: 254

August 16–19, 2014 Hillary Clinton
57.09%
Joe Biden
14.96%
Elizabeth Warren
9.06%
Martin O'Malley 2.76%, Andrew Cuomo 1.97%, Undecided 11.42%, Refused 2.76%
Civitas Institute

Margin of error: ± ?%
Sample size: 336

July 28–29, 2014 Hillary Clinton
40%
Elizabeth Warren
12%
Joe Biden
9%
Andrew Cuomo 3%, Bernie Sanders 2%, Howard Dean 1%, Jim Webb 1%, Amy Klobuchar 0%, Martin O'Malley 0%, Won't vote in Democratic primary 15%, Undecided 14%, Refused 3%, Other 0%

North Dakota

Delegate count: 18 Pledged, 5 Unpledged

Winner
Bernie Sanders
Primary date
June 7, 2016
Poll source Date 1st 2nd Other
Caucus results June 7, 2016 Bernie Sanders
64.2%
Hillary Clinton
25.6%
Others 10.2%

Ohio

Delegate count: 143 Pledged, 16 Unpledged

Winner
Hillary Clinton
Primary date
March 15, 2016
Poll source Date 1st 2nd Other
Primary results March 15, 2016 Hillary Clinton
56.1%
Bernie Sanders
43.1%
Other
0.8%
ARG[311]

Margin of error: ± 5.0%
Sample size: 400

March 12–13, 2016 Hillary Clinton
52%
Bernie Sanders
45%
Others / Undecided
3%
Monmouth[312]

Margin of error: ± 5.6%
Sample size: 302

March 11–13, 2016 Hillary Clinton
54%
Bernie Sanders
40%
Others / Undecided
6%
Quinnipiac[313]

Margin of error: ± 4.2%
Sample size: 543

March 8–13, 2016 Hillary Clinton
51%
Bernie Sanders
46%
Others / Undecided
4%
Public Policy Polling[314]

Margin of error: ± 4.4%
Sample size: 502

March 11–12, 2016 Hillary Clinton
46%
Bernie Sanders
41%
Others / Undecided
13%
CBS News/YouGov[315]

Margin of error: ± 5.3%
Sample size: 777

March 9–11, 2016 Hillary Clinton
52%
Bernie Sanders
43%
Others / Undecided
5%
NBC News/Wall Street Journal/Marist[316]

Margin of error: ± 4.6%
Sample size: 453

March 4–10, 2016 Hillary Clinton
58%
Bernie Sanders
38%
Others / Undecided
4%
Quinnipiac[53]

Margin of error: ± 4.3%
Sample size: 521

March 2–7, 2016 Hillary Clinton
52%
Bernie Sanders
43%
Others / Undecided
5%
Public Polling Policy

Margin of error: ± 4.4%
Sample size: 508

March 4–6, 2016 Hillary Clinton
56%
Bernie Sanders
35%
Others / Undecided
9%
CNN/ORC[317]

Margin of error: ± 5.5%
Sample size: 294

March 2–6, 2016 Hillary Clinton
63%
Bernie Sanders
33%
Others / Undecided
4%
Quinnipiac University

Margin of error: ± 4.3%
Sample size: 518

February 16–20, 2016 Hillary Clinton
55%
Bernie Sanders
40%
Others / Undecided
5%
BW Community Research Institute

Margin of error: ± 5%
Sample size: 385

February 11–20, 2016 Bernie Sanders
45%
Hillary Clinton
44%
Others / Undecided
11%
Public Policy Polling

Margin of error: ± ?%
Sample size: 1,138

January 12–14, 2016 Hillary Clinton
53%
Bernie Sanders
37%
Not sure 10%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
Quinnipiac University[318]

Margin of error: ± 4.9%
Sample size: 396

September 25 – October 5, 2015 Hillary Clinton
40%
Joe Biden
21%
Bernie Sanders
19%
Undecided 11%
Quinnipiac University[69]

Margin of error: ± 5.2%
Sample size: 353

August 7–18, 2015 Hillary Clinton
47%
Bernie Sanders
17%
Joe Biden
14%
Jim Webb 1%, Martin O'Malley 0%, Lincoln Chafee 0%, Other 3%, Wouldn't vote 6%, Undecided 12%
Quinnipiac University[319]

Margin of error: ± 5%
Sample size: 388

June 4–15, 2015 Hillary Clinton
60%
Joe Biden
13%
Bernie Sanders
10%
Martin O'Malley 1%, Lincoln Chafee 0%, Jim Webb 0%, Other 1%, Wouldn't vote 3%, Undecided 11%
Public Policy Polling

Margin of error: ± 5.2%
Sample size: 360

June 4–7, 2015 Hillary Clinton
61%
Bernie Sanders
13%
Michael Bloomberg
7%
Lincoln Chafee 2%, Martin O'Malley 2%, Jim Webb 1%, Not sure 13%
Quinnipiac University

Margin of error: ± 5.4%
Sample size: 324

March 17–28, 2015 Hillary Clinton
54%
Elizabeth Warren
14%
Joe Biden
9%
Martin O'Malley 3%, Bernie Sanders 3%, Jim Webb 2%, Other 1%, Wouldn't vote 3%, Undecided 12%
Joe Biden
34%
Elizabeth Warren
25%
Martin O'Malley
5%
Bernie Sanders 5%, Jim Webb 2%, Other 1%, Wouldn't vote 3%, Undecided 24%
Quinnipiac University

Margin of error: ± 5.5%
Sample size: 315

January 22 – February 1, 2015 Hillary Clinton
51%
Elizabeth Warren
14%
Joe Biden
7%
Bernie Sanders 5%, Martin O'Malley 1%, Jim Webb 0%, Other 2%, Wouldn't vote 4%, Undecided 15%
Joe Biden
28%
Elizabeth Warren
24%
Bernie Sanders
7%
Martin O'Malley 2%, Jim Webb 2%, Other 4%, Wouldn't vote 5%, Undecided 28%

Oklahoma

Delegate count: 38 Pledged, 4 Unpledged

Winner
Bernie Sanders
Primary date
March 1, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary results March 1, 2016 Bernie Sanders
51.9%
Hillary Clinton
41.5%
Others
6.6%
Monmouth[320]

Margin of error: ± 5.7%
Sample size: 300

February 25–28, 2016 Bernie Sanders
48%
Hillary Clinton
43%
Others / Undecided
9%
Sooner Poll/News 9/News on 6[321]

Margin of error: ± 4.3%
Sample size: 510

February 23–25, 2016 Hillary Clinton
40%
Bernie Sanders
31%
Others / Undecided
29%
Public Policy Polling[322]

Margin of error: ± 4.2%
Sample size: 542

February 14–16,
2016
Hillary Clinton
46%
Bernie Sanders
44%
Undecided 9%
Sooner Poll[323]

Margin of error: ± 5.0%
Sample size: 360

February 6–9, 2016 Hillary Clinton
43.9%
Bernie Sanders
28%
Undecided 28.1%
Sooner Poll[324]

Margin of error: ± 5.1%
Sample size: 369

November 12–15, 2015 Hillary Clinton
46.6%
Bernie Sanders
12.2%
Martin O'Malley
2.2%
Undecided 39.1%
The Oklahoman/Cole Hargrave Snodgrass & Associates[325]

Margin of error: ± 4.3%
Sample size: 550

October 19–22, 2015 Hillary Clinton
30%
Bernie Sanders
21%
Martin O'Malley
1%
Undecided 46%

Oregon

Delegate count: 61 Pledged, 13 Unpledged

Winner
Bernie Sanders
Primary date
May 17, 2016
Poll source Date 1st 2nd Other
Official Primary Results May 17, 2016 Bernie Sanders
56.2%
Hillary Clinton
42.1%
Misc.
1.7%
DHM Research[326]

Margin of error: ± 5.6%
Sample size: 901

May 6–9, 2016 Hillary Clinton
48%
Bernie Sanders
33%
Others / Undecided
19%
KATU-TV/SurveyUSA[327]

Margin of error: ± 4.0%
Sample size: 630

March 28-April 1, 2016 Hillary Clinton
37%
Bernie Sanders
36%
Others / Undecided
27%
DHM Research[328]

Margin of error: ± 7%
Sample size: 206

July 22–27, 2015 Hillary Clinton
44%
Bernie Sanders
39%
Others / Undecided
17%

Pennsylvania

Delegate count: 189 Pledged, 21 Unpledged

Winner
Hillary Clinton
Primary date
April 26, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary results April 26, 2016 Hillary Clinton
55.6%
Bernie Sanders
43.5%
Other
0.9%
FOX 29/Opinion Savvy[329]

Margin of error: ± 3.2%
Sample size: 942

April 24, 2016 Hillary Clinton
52%
Bernie Sanders
41%
Others / Undecided
7%
CPEC LLC[330]

Margin of error: ± 2.3%
Sample size: 665

April 22–24, 2016 Hillary Clinton
63%
Bernie Sanders
37%
Public Policy Polling[40]

Margin of error: ± 3.6%
Sample size: 728

April 22–24, 2016 Hillary Clinton
51%
Bernie Sanders
41%
Others / Undecided
9%
American Research Group[331]

Margin of error: ± 5.0%
Sample size: 400

April 21-24, 2016 Hillary Clinton
58%
Bernie Sanders
38%
Others / Undecided
4%
Harper Polling[332]

Margin of error: ± 3.9%
Sample size: 641

April 21-23, 2016 Hillary Clinton
61%
Bernie Sanders
33%
Others / Undecided
6%
CBS/YouGov[333]

Margin of error: ± 6.7%
Sample size: 831

April 20-22, 2016 Hillary Clinton
51%
Bernie Sanders
43%
Others / Undecided
6%
NBC/WSJ/Marist[334]

Margin of error: ± 1.9%
Sample size: 734

April 18-20, 2016 Hillary Clinton
55%
Bernie Sanders
40%
Others / Undecided
5%
Monmouth[335]

Margin of error: ± 5.6%
Sample size: 302

April 17-19, 2016 Hillary Clinton
52%
Bernie Sanders
39%
Others / Undecided
9%
Franklin & Marshall College[336]

Margin of error: ± 5.3%
Sample size: 510

April 11-18, 2016 Hillary Clinton
58%
Bernie Sanders
31%
Others / Undecided
11%
FOX News[337]

Margin of error: ± 3.5%
Sample size: 805

April 4-7, 2016 Hillary Clinton
49%
Bernie Sanders
38%
Others / Undecided
13%
Quinnipiac[338]

Margin of error: ± 4.3%
Sample size: 514

March 30-April 4, 2016 Hillary Clinton
50%
Bernie Sanders
44%
Others / Undecided
6%
Harper[339]

Margin of error: ± 4.0%
Sample size: 603

April 2-3, 2016 Hillary Clinton
55%
Bernie Sanders
33%
Others / Undecided
12%
Franklin & Marshall[340]

Margin of error: ± 4.7%
Sample size: 408

March 14-20, 2016 Hillary Clinton
53%
Bernie Sanders
28%
Others / Undecided
19%
Harper[341]

Margin of error: ± 5.3%
Sample size: 347

March 1-2, 2016 Hillary Clinton
57%
Bernie Sanders
27%
Others / Undecided
16%
Franklin & Marshall College[342]

Margin of error: ± 3.1%
Sample size: 486

February 13–21, 2016 Hillary Clinton
48%
Bernie Sanders
27%
Others / Undecided
25%
Robert Morris University[343]

Margin of error: ± 4.5%
Sample size: 511

February 11–16, 2016 Hillary Clinton
48%
Bernie Sanders
41%
Others / Undecided
11%
Harper[344]

Margin of error: ± 3.8%
Sample size: 640

January 22–23, 2016 Hillary Clinton
55%
Bernie Sanders
28%
Martin O'Malley
4%
Undecided 13%
Franklin & Marshall[345]

Margin of error: ± 3.6%
Sample size: 361

January 18–23, 2016 Hillary Clinton
46%
Bernie Sanders
29%
Martin O'Malley
2%
Other 7%, Undecided 16%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
Franklin & Marshall[346]

Margin of error: ± 3.9%
Sample size: 303

October 19–25, 2015 Hillary Clinton
52%
Bernie Sanders
18%
Martin O'Malley
0%
Other 12%, Undecided 18%
Public Policy Polling

Margin of error: ± 4.8%
Sample size: 416

October 8–11, 2015 Hillary Clinton
40%
Bernie Sanders
22%
Joe Biden
20%
Lincoln Chafee 3%, Martin O'Malley 2%, Lawrence Lessig 1%, Jim Webb 1%, Not Sure 12%
Quinnipiac University[69]

Margin of error: ± 4.6%
Sample size: 462

August 7–18, 2015 Hillary Clinton
45%
Bernie Sanders
19%
Joe Biden
17%
Jim Webb 1%, Martin O'Malley 1%, Lincoln Chafee 0%, Other 2%, Wouldn't vote 3%, Undecided 12%
Quinnipiac University[319]

Margin of error: ± 4.9%
Sample size: 402

June 4–15, 2015 Hillary Clinton
53%
Joe Biden
15%
Bernie Sanders
10%
Jim Webb 2%, Martin O'Malley 1%, Lincoln Chafee 0%, Other 1%, Wouldn't vote 4%, Undecided 15%
Public Policy Polling

Margin of error: ± 5%
Sample size: 385

May 21–24, 2015 Hillary Clinton
63%
Bernie Sanders
14%
Martin O'Malley
6%
Lincoln Chafee 3%, Jim Webb 3%, Not sure 12%
Quinnipiac University

Margin of error: ± 4.8%
Sample size: 415

March 17–28, 2015 Hillary Clinton
48%
Elizabeth Warren
15%
Joe Biden
13%
Martin O'Malley 1%, Bernie Sanders 1%, Jim Webb 1%, Other 2%, Wouldn't vote 4%, Undecided 15%
Joe Biden
34%
Elizabeth Warren
27%
Martin O'Malley
4%
Bernie Sanders 2%, Jim Webb 1%, Other 3%, Wouldn't vote 5%, Undecided 25%
Quinnipiac University

Margin of error: ± 5%
Sample size: 392

January 22 – February 1, 2015 Hillary Clinton
54%
Elizabeth Warren
12%
Joe Biden
10%
Martin O'Malley 2%, Bernie Sanders 2%, Jim Webb 1%, Other 1%, Wouldn't vote 4%, Undecided 15%
Joe Biden
34%
Elizabeth Warren
21%
Martin O'Malley
5%
Jim Webb 4%, Bernie Sanders 3%, Other 2%, Wouldn't vote 5%, Undecided 26%
Public Policy Polling

Margin of error: ± 4.4%
Sample size: 494

January 15–18, 2015 Hillary Clinton
58%
Joe Biden
13%
Elizabeth Warren
11%
Bernie Sanders 5%, Martin O'Malley 1%, Jim Webb 1%, Someone else/Undecided 11%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
Public Policy Polling

Margin of error: ± 5%
Sample size: 382

May 30 – June 1, 2014 Hillary Clinton
65%
Joe Biden
9%
Andrew Cuomo
5%
Elizabeth Warren 5%, Cory Booker 4%, Kirsten Gillibrand 1%, Brian Schweitzer 1%, Mark Warner 1%, Martin O'Malley 0%, Someone else/Not sure 10%
Franklin & Marshall College

Margin of error: ± 4.3%
Sample size: 524

March 25–31, 2014 Hillary Clinton
55%
Joe Biden
5%
Elizabeth Warren
4%
Andrew Cuomo 2%, Howard Dean 0%, Other 5%, Undecided 29%
Franklin & Marshall College

Margin of error: ± 4.2%
Sample size: 548

February 18–23, 2014 Hillary Clinton
58%
Elizabeth Warren
7%
Joe Biden
6%
Andrew Cuomo 2%, Howard Dean 1%, Other 3%, Undecided 23%
Polls in 2013
Poll source Date 1st 2nd 3rd Other
Public Policy Polling

Margin of error: ± 4.7%
Sample size: 436

November 22–25, 2013 Hillary Clinton
61%
Joe Biden
13%
Elizabeth Warren
11%
Andrew Cuomo 3%, Cory Booker 2%, Kirsten Gillibrand 1%, Martin O'Malley 0%, Brian Schweitzer 0%, Mark Warner 0%, Someone Else/Undecided 9%

Rhode Island

Delegate count: 24 Pledged, 9 Unpledged

Winner
Bernie Sanders
Primary date
April 26, 2016
Poll source Date 1st 2nd Other
Certified Primary results April 26, 2016 Bernie Sanders
54.7%
Hillary Clinton
43.1%
Others / Uncommitted
2.2%
Public Policy Polling[40]

Margin of error: ± 3.8%
Sample size: 668

April 22–24, 2016 Bernie Sanders
49%
Hillary Clinton
45%
Others / Undecided
6%
Brown University[347]

Margin of error: ± 4.0%
Sample size: 436

April 19–21, 2016 Hillary Clinton
43%
Bernie Sanders
34%
Others / Undecided
23%
Brown University[348]

Margin of error: ± ?%
Sample size: 394

February 22–23, 2016 Hillary Clinton
49%
Bernie Sanders
40%
Others / Undecided
11%
Brown University[348]

Margin of error: ± ?%
Sample size: 396

February 17–20, 2016 Bernie Sanders
48%
Hillary Clinton
41%
Others / Undecided
11%

Primary Results

South Carolina

Delegate count: 53 Pledged, 6 Unpledged

Winner
Hillary Clinton
Primary date
27 February 2016
Poll source Date 1st 2nd 3rd Other
Official Primary Results February 27, 2016 Hillary Clinton
73.4%
Bernie Sanders
26.0%
Others
0.6%
Clemson[349]

Margin of error: 3.0%
Sample size: 650

February 20–25, 2016 Hillary Clinton
64%
Bernie Sanders
14%
Others / Undecided
22%
Emerson College[350]

Margin of error: 6.0%
Sample size: 266

February 22–24, 2016 Hillary Clinton
60%
Bernie Sanders
37%
Others / Undecided
3%
NBC/WSJ/Marist[351]

Margin of error: 4.8%
Sample size: 425

February 15–17, 2016 Hillary Clinton
60%
Bernie Sanders
32%
Other
8%
Bloomberg Politics[352]

Margin of error: 4.9%
Sample size: 403

February 13–17,
2016
Hillary Clinton
53%
Bernie Sanders
31%
Not sure
16%
ARG[353]

Margin of error: 5%
Sample size: 400

February 14–16, 2016 Hillary Clinton
61%
Bernie Sanders
31%
Someone else 1% No opinion 7%
Public Policy Polling[354]

Margin of error: ± 4%
Sample size: 525

February 14–15, 2016 Hillary Clinton
55%
Bernie Sanders
34%
Undecided 12%
CNN/ORC[355]

Margin of error: 6%
Sample size: 289

February 10–15, 2016 Hillary Clinton
56%
Bernie Sanders
38%
Someone else 3% No opinion 4%
ARG[356]

Margin of error: ± 5.0%
Sample size: 400

February 12–13, 2016 Hillary Clinton
65%
Bernie Sanders
27%
Other 1%, Undecided 7%
YouGov/CBS News[357]

Margin of error: ± 8.7%
Sample size: 404

February 10–12, 2016 Hillary Clinton
59%
Bernie Sanders
40%
No Preference 1%
NBC/WSJ/Marist[358]

Margin of error: ± 4.6%
Sample size: 446

January 17–23, 2016 Hillary Clinton
64%
Bernie Sanders
27%
Martin O'Malley
2%
Undecided 7%
YouGov/CBS News[359]

Margin of error: ± 9.4%
Sample size: 388

January 17–21, 2016 Hillary Clinton
60%
Bernie Sanders
38%
Martin O'Malley
0%
Undecided 2%
SC New Democrats

Margin of error: ± ?%
Sample size: 583

January 12–15, 2016 Hillary Clinton
47%
Bernie Sanders
28%
Martin O'Malley
2%
Undecided 22%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
YouGov/CBS News[360]

Margin of error: ± 5.0%
Sample size: 420

December 13–17, 2015 Hillary Clinton
67%
Bernie Sanders
31%
Martin O'Malley
2%
No Preference 0%
Fox News

Margin of error: ± 5.0%
Sample size: 364

December 5–8, 2015 Hillary Clinton
65%
Bernie Sanders
21%
Martin O'Malley
3%
Other 1%, None of the Above 7%, DK 3%
YouGov/CBS News[139]

Margin of error: ± 6.0%
Sample size: 420

November 15–19, 2015 Hillary Clinton
72%
Bernie Sanders
25%
Martin O'Malley
2%
Undecided 1%
Public Policy Polling[361]

Margin of error: ± 4.9%
Sample size: 400

November 7–8, 2015 Hillary Clinton
72%
Bernie Sanders
18%
Martin O'Malley
5%
Unsure 5%
Monmouth University[362]

Margin of error: ± 4.9%
Sample size: 400

November 5–8, 2015 Hillary Clinton
69%
Bernie Sanders
21%
Martin O'Malley
1%
Other 1% No Preference 8%
Winthrop University[363]

Margin of error: ± 3.4%
Sample size: 832

October 24 – November 1, 2015 Hillary Clinton
71%
Bernie Sanders
15%
Martin O'Malley
2%
Refused 2% Undecided 9% Wouldn't Vote 1%
YouGov/CBS News[364]

Margin of error: ± 8.2%
Sample size: 427

October 15–22, 2015 Hillary Clinton
68%
Bernie Sanders
25%
Martin O'Malley
1%
Jim Webb 1%, Lincoln Chafee 0%, Lawrence Lessig 0%, No preference 4%
Clemson Palmetto[365]

Margin of error: 4.0%
Sample size: 600

October 13–23, 2015 Hillary Clinton
43%
Bernie Sanders
6%
Martin O'Malley
1%
Undecided 50%
CNN/ORC[366]

Margin of error: 5.5%
Sample size: 301

October 3–10, 2015 Hillary Clinton
49%
Joe Biden
24%
Bernie Sanders
18%
Martin O'Malley 3%, Someone else 1%, None/No one 1%, No opinion 4%
Gravis Marketing[367]

Margin of error: ± ?%
Sample size: ?

September 25–27, 2015 Hillary Clinton
50%
Joe Biden
19%
Bernie Sanders
13%
Lincoln Chafee 1%, Jim Webb <1%, Martin O'Malley <1%, Unsure 17%
YouGov/CBS News[258]

Margin of error: ± 6.8%
Sample size: 528

Sep. 3–10, 2015 Hillary Clinton
46%
Bernie Sanders
23%
Joe Biden
22%
No preference 8%, Jim Webb 1%, Lincoln Chafee 0%, Martin O'Malley 0%
Public Policy Polling[368]

Margin of error: ± 5.6%
Sample size: 302

Sep. 3–6, 2015 Hillary Clinton
54%
Joe Biden
24%
Bernie Sanders
9%
Martin O’Malley, Jim Webb 2%; Lincoln Chafee 1%
Gravis Marketing[369]

Margin of error: ± 4.0%
Sample size: 209

July 29–30, 2015 Hillary Clinton
78%
Bernie Sanders
8%
Elizabeth Warren
6%
Joe Biden 6%, Jim Webb 1%, Martin O'Malley 1%, Lincoln Chafee 1%
Morning Consult[370]

Margin of error: ?
Sample size: 309

May 31 – June 8, 2015 Hillary Clinton
56%
Joe Biden
15%
Bernie Sanders
10%
Martin O'Malley 3%, Jim Webb 2%, Lincoln Chafee 1%, Someone else 2% Undecided 11%
Public Policy Polling

Margin of error: ± 6.2%
Sample size: 252

February 12–15, 2015 Hillary Clinton
59%
Joe Biden
18%
Elizabeth Warren
10%
Martin O'Malley 3%, Bernie Sanders 1%, Jim Webb 1%, Other/Undecided 8%
NBC News/Marist

Margin of error: ± 5.2%
Sample size: 352

February 3–10, 2015 Hillary Clinton
65%
Joe Biden
20%
Bernie Sanders
3%
Martin O'Malley 2%, Jim Webb 2%, Undecided 8%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
Clemson University

Margin of error: ±6%
Sample size: 400

May 26 – June 2, 2014 Hillary Clinton
50%
Joe Biden
12%
Andrew Cuomo
2%
Martin O'Malley 1%, Deval Patrick 0%, Brian Schweitzer 0%, Undecided/Don't know 35%

South Dakota

Delegate count: 20 Pledged, 5 Unpledged

Winner
Hillary Clinton
Primary date
June 7, 2016
Poll source Date 1st 2nd Others / Undecided
Official Primary results June 7, 2016 Hillary Clinton
51.0%
Bernie Sanders
49.0%
Targeted Persuasion[371]

Margin of error: ±3.31%
Sample size: 874

May 23-24, 2016 Hillary Clinton
50%
Bernie Sanders
47%
Undecided
3%

Tennessee

Delegate count: 67 Pledged, 9 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd 3rd Other
Primary results March 1, 2016 Hillary Clinton
66.1%
Bernie Sanders
32.5%
Others / Uncommitted
1.5%
SurveyMonkey[187]

Margin of error: ?
Sample size: 533

February 22–29, 2016 Hillary Clinton
54%
Bernie Sanders
37%
Others / Undecided
9%
NBC/WSJ/Marist[372]

Margin of error: ± 3.8
Sample size: 405

February 22–25, 2016 Hillary Clinton
60%
Bernie Sanders
34%
Other
6%
Public Policy Polling[373]

Margin of error: ± 4.4
Sample size: 500

February 14–16, 2016 Hillary Clinton
58%
Bernie Sanders
32%
Vanderbilt/PSRA

Margin of error: 6.7%
Sample size: 346

November 11–23, 2015 Hillary Clinton
48%
Bernie Sanders
28%
Martin O'Malley
3%
Undecided 10%, Other 5%, Wouldn't Vote 4%
MTSU[374]

Margin of error: ± 4%
Sample size: 603

October 25–27, 2015 Hillary Clinton
44%
Bernie Sanders 16% Don't know 25%

Texas

Delegate count: 222 Pledged, 30 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd 3rd Other
Primary results March 1, 2016 Hillary Clinton
65.2%
Bernie Sanders
33.2%
Others
1.6%
Emerson[375]

Margin of error: ± 5.9%
Sample size: 275

February 26–28, 2016 Hillary Clinton
68%
Bernie Sanders
26%
Others / Undecided
6%
American Research Group[376]

Margin of error: ± 5.0%
Sample size: 400

February 26–28, 2016 Hillary Clinton
58%
Bernie Sanders
38%
Others / Undecided
4%
YouGov/CBS News[377]

Margin of error: ± 6.9%
Sample size: 750

February 22–26, 2016 Hillary Clinton
61%
Bernie Sanders
37%
Others / Undecided
2%
Monmouth[378]

Margin of error: ± 5.6
Sample size: 304

February 22–24, 2016 Hillary Clinton
64%
Bernie Sanders
30%
Others / Undecided
6%
Emerson College[379]

Margin of error: ± 5.4
Sample size: 328

February 21–23, 2016 Hillary Clinton
56%
Bernie Sanders
40%
Others / Undecided
4%
NBC News/Wall St. Jrnl[380]

Margin of error: ± 4.9
Sample size: 405

February 18–23, 2016 Hillary Clinton
59%
Bernie Sanders
38%
Others / Undecided
3%
KTVT-CBS 11[381]

Margin of error: ± 3.8
Sample size: 675

February 22, 2016 Hillary Clinton
61%
Bernie Sanders
29%
Others / Undecided
10%
TEGNA/SurveyUSA[382]

Margin of error: ± 4.1
Sample size: 569

February 21–22, 2016 Hillary Clinton
61%
Bernie Sanders
32%
Others / Undecided
7%
Austin American-Statesman[383]

Margin of error: ± 5.0
Sample size: 411

February 19–22, 2016 Hillary Clinton
66%
Bernie Sanders
26%
Others / Undecided
8%
UT/TT[384]

Margin of error: ±4.57
Sample Size: ? Dem Voters

February 12–19, 2016 Hillary Clinton
57%
Bernie Sanders
40%
Rocky de la Fuente
2%
Martin O'Malley 1%
Willie Wilson 1%
Public Policy Polling[385]

Margin of error: ± 4.3
Sample size: 514

February 14–16, 2016 Hillary Clinton
57%
Bernie Sanders
34%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
University of Texas/Texas Tribune[386]

Margin of error ± 4.57%
Sample Size: 459

October 30 – November 8, 2015 Hillary Clinton
61%
Bernie Sanders
30%
Martin O'Malley 1% Lawrence Lessig 0% No Opinion 7%
CBS-DFW[387]

Margin of error: ± 3.09%
Sample size: 1008

October 23–24, 2015 Hillary Clinton
59%
Bernie Sanders
10%
Martin O'Malley
3%
Undecided 28%
Texas Lyceum[388]

Margin of error: ± 7.15%
Sample size: 185

September 8–21, 2015 Hillary Clinton
36%
Bernie Sanders
24%
Joe Biden
15%
Jim Webb 1%, Martin O'Malley 0%, Lincoln Chafee 0% Undecided 23%
UoT/Texas Tribune[389]

Margin of error: ± 4.58%
Sample size: 457

June 5–14, 2015 Hillary Clinton
53%
Bernie Sanders
15%
Joe Biden
8%
Elizabeth Warren 8%, Andrew Cuomo 1%, Martin O'Malley 1%, Jim Webb 1%, Lincoln Chafee 1% Undecided 12%
UoT/Texas Tribune[390]

Margin of error: ± 4.89%
Sample size: 401

February 6–15, 2015 Hillary Clinton
62%
Elizabeth Warren
12%
Joe Biden
6%
Bernie Sanders 5%, Martin O'Malley 1%, Jim Webb 1%, Undecided 14%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
UoT/Texas Tribune

Margin of error: ± 4.73%
Sample size: 429

October 10–19, 2014 Hillary Clinton
60%
Elizabeth Warren
13%
Joe Biden
10%
Andrew Cuomo 2%, Brian Schweitzer 1%, Jim Webb 1%, Martin O'Malley 0%, Undecided 13%
UoT/Texas Tribune

Margin of error: ± 4.75%
Sample size: 426

May 30 – June 8, 2014 Hillary Clinton
64%
Elizabeth Warren
15%
Joe Biden
8%
Andrew Cuomo 2%, Brian Schweitzer 1%, Martin O'Malley 0%, Undecided 10%
Polls in 2013
Poll source Date 1st 2nd 3rd Other
UoT/Texas Tribune

Margin of error: ± 4.82%
Sample size: 414

October 18–29, 2013 Hillary Clinton
67%
Joe Biden
7%
Elizabeth Warren
5%
Andrew Cuomo 1%, Martin O'Malley 1%, Brian Schweitzer 1%, Mark Warner 1%, Kirsten Gillibrand 0%, Don't Know 17%
UoT/Texas Tribune

Margin of error: ± 5.89%
Sample size: 376

May 31 – June 9, 2013 Hillary Clinton
66%
Joe Biden
11%
Andrew Cuomo
1%
Kirsten Gillibrand 1%, Mark Warner 1%, Martin O'Malley 0%, Brian Schweitzer 0%, Don't Know 19%

Utah

Delegate count: 33 Pledged, 4 Unpledged

Winner
Bernie Sanders
Caucus date
March 22, 2016
Poll source Date 1st 2nd 3rd Other
Caucus results March 24, 2016 Bernie Sanders
79.21%
Hillary Clinton
20.33%
Other
0.46%
Dan Jones & Associates[391]

Margin of error: ± 7%
Sample size: 250

March 8–15, 2016 Bernie Sanders
52%
Hillary Clinton
44%
Dan Jones & Associates[392]

Margin of error: ± ?
Sample size: 625

February 10–15, 2016 Hillary Clinton
51%
Bernie Sanders
44%
SurveyUSA[393]

Margin of error: ± 7.2%
Sample size: 188

January 6–13, 2016 Hillary Clinton
50%
Bernie Sanders
40%
Other/Undecided 10%
Dan Jones & Associates[394]

Margin of error: ± 3.9%
Sample size: 624

November 5–14, 2015 Hillary Clinton
54%
Bernie Sanders
34%
Martin O'Malley 3% Don't Know 5%
Dan Jones & Associates[395]

Margin of error: ?
Sample size: ?

September 8–17, 2015 Bernie Sanders
31%
Hillary Clinton
30%
Joe Biden
20%
Other/Undecided 19%
Dan Jones & Associates[396]

Margin of error: ± ?
Sample size: ?

July 14–21, 2015 Hillary Clinton
50%
Bernie Sanders
30%
Joe Biden
12%
Other/Undecided 8%
Dan Jones & Associates[397]

Margin of error: ± ?
Sample size: ?

March 3–5, 2015 Hillary Clinton
56%
Elizabeth Warren
25%
Joe Biden
4%
Other/Undecided 15%

Vermont

Delegate count: 16 Pledged, 10 Unpledged

Winner
Bernie Sanders
Primary date
March 1, 2016
Poll source Date 1st 2nd Other
Official Primary results March 1, 2016 Bernie Sanders
85.7%
Hillary Clinton
13.6%
Others / Uncommitted
0.8%
The Castleton Polling Institute [398]

Margin of error: ± 3.27
Sample size: 895

February 3–17, 2016 Bernie Sanders
83.1%
Hillary Clinton
9.0%
Others / Undecided 7.9%
Public Policy Polling[399]

Margin of error: ± 3.7
Sample size: 500

February 14–16, 2016 Bernie Sanders
86%
Hillary Clinton
10%
Castleton University[400]

Margin of error: ± 4%
Sample size: 617

August 24 – September 14, 2015 Bernie Sanders
65%
Hillary Clinton
14%
Others 10%, Not sure 11%
Castleton University[401]

Margin of error: ± 3.8%
Sample size: 653

October 10, 2014 Bernie Sanders
36%
Hillary Clinton
29%
Neither 29%, Not sure 5%, Refused 1%

Virginia

Delegate count: 95 Pledged, 14 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd Other
Primary results March 1, 2016 Hillary Clinton
64.3%
Bernie Sanders
35.2%
Other 0.5%
SurveyMonkey[187]

Margin of error: ?
Sample size: 908

February 22–29, 2016 Hillary Clinton
57%
Bernie Sanders
36%
Others / Undecided
7%
YouGov/CBS News[402]

Margin of error: 9.2%
Sample size: 471

February 22–26, 2016 Hillary Clinton
59%
Bernie Sanders
39%
Others / Undecided
2%
Monmouth[403]

Margin of error: ± 5.6%
Sample size: 302

February 22–24, 2016 Hillary Clinton
60%
Bernie Sanders
33%
Others / Undecided
7%
Roanoke College[404]

Margin of error: ± 4.8%
Sample size: 415

February 16–24, 2016 Hillary Clinton
50%
Bernie Sanders
33%
Others / Undecided
17%
Public Policy Polling[405]

Margin of error: ± 4.4
Sample size: 500

February 14–16, 2016 Hillary Clinton
56%
Bernie Sanders
34%
Christopher Newport University[406]

Margin of error: ± 4.3%
Sample size: 735

February 3–14, 2016 Hillary Clinton
52%
Bernie Sanders
40%
Others / Undecided
8%
Polls in 2015
Poll source Date 1st 2nd 3rd Other
University of Mary Washington[407]

Registered voters:
Margin of error: ± 3.9%
Sample size: 357
Likely voters:
Margin of error: ± 4.3%
Sample size: 276

November 4–9, 2015 Hillary Clinton
58% (RV)
63% (LV)
Bernie Sanders
32% (RV)
27% (LV)
Martin O'Malley
4% (RV)
5% (LV)
Don't know/None/Refused/Wouldn't vote in that primary
7% (RV)
5% (LV)
Christopher Newport University[408]

Margin of error: ± 5.1%
Sample size: 407

September 29 –October 8, 2015 Hillary Clinton
40%
Bernie Sanders
23%
Joe Biden
23%
Jim Webb 5%, Martin O'Malley 2%, Lincoln Chafee <1%, Someone Else 1%, Undecided/Don't Know/Refused 5%
Public Policy Polling[409]

Margin of error: ± 4.9%
Sample size: 409

July 13–15, 2015 Hillary Clinton
64%
Bernie Sanders
14%
Jim Webb
8%
Lincoln Chafee 5%, Martin O'Malley 2%, Not sure 7%
Christopher Newport University[410]

Margin of error: ± ?
Sample size: ?

April 13–24, 2015 Hillary Clinton
80%
Jim Webb
6%
Joe Biden
5%
Bernie Sanders 2%, Martin O'Malley 1%, Lincoln Chafee<1%, Someone else 2%, Undecided 3%
Christopher Newport University

Margin of error: ± ?
Sample size: ?

January 30 – February 10, 2015 Hillary Clinton
65%
Jim Webb
10%
Joe Biden
8%
Elizabeth Warren 8%, Deval Patrick 2%, Bernie Sanders 2%, Andrew Cuomo 1%, Martin O'Malley 1%, Someone else 1%, Undecided 2%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
Christopher Newport University

Margin of error: ± 5%
Sample size: 391

February 23–28, 2014 Hillary Clinton
66%
Joe Biden
19%
Elizabeth Warren
7%
Undecided 9%
Polls in 2013
Poll source Date 1st 2nd 3rd Other
University of Mary Washington

Margin of error: ±?
Sample size: ?

September 25–29, 2013 Hillary Clinton
34%
Mark Warner
16%
Joe Biden
9%
Elizabeth Warren 3%, Andrew Cuomo 2%, Martin O'Malley 1%, None 12%, Don't know 17%
Public Policy Polling

Margin of error: ±5.2%
Sample size: 357

July 11–14, 2013 Hillary Clinton
51%
Joe Biden
14%
Mark Warner
11%
Elizabeth Warren 6%, Cory Booker 4%, Martin O'Malley 3%, Andrew Cuomo 2%, Brian Schweitzer 1%, Kirsten Gillibrand 0%, Someone else/Undecided 8%
Public Policy Polling

Margin of error: ± 4.8%
Sample size: 421

May 24–26, 2013 Hillary Clinton
56%
Joe Biden
14%
Mark Warner
11%
Andrew Cuomo 3%, Elizabeth Warren 3%, Kirsten Gillibrand 1%, Martin O'Malley 1%, Deval Patrick 0%, Brian Schweitzer 0%, Someone else/Undecided 10%
University of Mary Washington

Margin of error: ±?
Sample size: ?

March 20–24, 2013 Hillary Clinton
38%
Mark Warner
18%
Joe Biden
10%
Andrew Cuomo 3%, Martin O'Malley 3%, Other 1%, None 12%, Don't know 12%

Washington

Delegate count: 101 Pledged, 17 Unpledged

Winner
Bernie Sanders
Caucus date
March 26, 2016
Poll source Date 1st 2nd 3rd Other
Caucus results March 29, 2016 Bernie Sanders
72.72%
Hillary Clinton
27.10%
Other
0.18%
Gravis Marketing[411]

Margin of error: ± 6%
Sample size: 256

May 18–19, 2015 Hillary Clinton
35%
Elizabeth Warren
26%
Bernie Sanders
19%
Joe Biden 4%, Martin O'Malley 3%, Jim Webb 1%, Unsure 12%
Hillary Clinton
45%
Bernie Sanders
36%
Lincoln Chafee
2%
Bill De Blasio 2%, Martin O'Malley 2%, Jim Webb 1%, Unsure 12%
Public Policy Polling[412]

Margin of error: ± 5%
Sample size: 391

May 14–17, 2015 Hillary Clinton
57%
Bernie Sanders
24%
Martin O'Malley
4%
Jim Webb 2%, Lincoln Chafee 1%, Not sure 12%

West Virginia

Delegate count: 29 Pledged, 8 Unpledged

Winner
Bernie Sanders
Primary date
May 10, 2016
Poll source Date 1st 2nd 3rd Other
Primary results May 10, 2016 Bernie Sanders
51.4%
Hillary Clinton
35.8%
Paul Farrell
8.9%
Others
3.9%
MetroNews[413]

Margin of error: ±4.0%
Sample size: 315

April 22-May 2, 2016 Bernie Sanders
47%
Hillary Clinton
43%
Undecided 11%
Public Policy Polling[414]

Margin of error: ±3.9%
Sample size: 637

April 29-May 1, 2016 Bernie Sanders
45%
Hillary Clinton
37%
Undecided 18%
West Virginia Veterans/Thirty-Ninth Street Strategies[415]

Margin of error: ±3.9%
Sample size: 600

March 2–6, 2016 Hillary Clinton
44%
Bernie Sanders
31%
Paul Farrell
6%
Keith Judd 1%
Others 7%
Undecided 11%
Orion Strategies[416]

Margin of error: ±5.6%
Sample size: 306

February 20–21, 2016 Bernie Sanders
32%
Hillary Clinton
24%
Undecided 44%
REPASS Research

Margin of error: ±4.9%[417]
Sample size: 411

February 11–16, 2016 Bernie Sanders
57%
Hillary Clinton
29%
Orion Strategies[418]

Margin of error: ±4.9%[419]
Sample size: 306

August 27, 2015 Hillary Clinton
23%
Joe Biden
16%
Bernie Sanders
12%
Undecided 49%
Prism Surveys[420]

Margin of error: ± 3.21%
Sample size: 900

August 21, 2015 Hillary Clinton
36%
Bernie Sanders
32%
Undecided 32%

Wisconsin

Delegate count: 86 Pledged, 10 Unpledged

Winner
Bernie Sanders
Primary date
April 5, 2016
Poll source Date 1st 2nd 3rd Other
Official Primary Results April 5, 2016 Bernie Sanders
56.6%
Hillary Clinton
43.1%
Others / Uncommitted
0.4%
ARG[421]

Margin of error: ± 5.0%
Sample size: 400

April 1–3, 2016 Hillary Clinton
49%
Bernie Sanders
48%
Others / Undecided
3%
Emerson[422]

Margin of error: ± 4.2%
Sample size: 542

March 30 – April 3, 2016 Bernie Sanders
51%
Hillary Clinton
43%
Others / Undecided
6%
CBS News/YouGov[423]

Margin of error: ± 3.7%
Sample size: 653

March 29 – April 1, 2016 Bernie Sanders
49%
Hillary Clinton
47%
Others / Undecided
4%
FOX Business[424]

Margin of error: ± 3.0%
Sample size: 860

March 28–30, 2016 Bernie Sanders
48%
Hillary Clinton
43%
Others / Undecided
10%
Loras College[425]

Margin of error: ± 4.8%
Sample size: 416

March 28–29, 2016 Hillary Clinton
47%
Bernie Sanders
41%
Others / Undecided
12%
Public Policy Polling[426]

Margin of error: ± 3.7%
Sample size: 720

March 28–29, 2016 Bernie Sanders
49%
Hillary Clinton
43%
Others / Undecided
8%
MULaw Poll[427]

Margin of error: ± 6.3%
Sample size: 405

March 24–28, 2016 Bernie Sanders
49%
Hillary Clinton
45%
Others / Undecided
6%
Emerson College[428]

Margin of error: ± 4.6%
Sample size: 439

March 20–22, 2016 Hillary Clinton
50%
Bernie Sanders
44%
Others / Undecided
6%
MULaw Poll[429]

Margin of error: ± 6.9%
Sample size: 343

February 18–21, 2016 Bernie Sanders
44%
Hillary Clinton
43%
Others / Undecided
13%
MULaw Poll[430]

Margin of error: ± 6.5%
Sample size: 312

January 21–24, 2016 Hillary Clinton
45%
Bernie Sanders
43%
Martin O'Malley
1%
Not Reported
Polls in 2015
Poll source Date 1st 2nd 3rd Other
Marquette Law School[431]

Margin of error: ± 6.1%
Sample size: 374

November 12–15, 2015 Hillary Clinton
50%
Bernie Sanders
41%
Martin O'Malley
2%
Undecided 7%
St. Norbert College[432]

Margin of error: ± 6%
Sample size: ?

October 14–17, 2015 Hillary Clinton
35%
Bernie Sanders
33%
Joe Biden
21%
Martin O'Malley 1%, Lincoln Chafee 0%, Jim Webb 0%, Not Sure 10%
Hillary Clinton
47%
Bernie Sanders
42%
Martin O'Malley 1%, Lincoln Chafee 1%, Jim Webb <1%, Not Sure 7%
Marquette University[433]

Margin of error: ± 5.9%
Sample size: 394

September 24–28, 2015 Hillary Clinton
42%
Bernie Sanders
30%
Joe Biden
17%
Martin O'Malley 1%, Lincoln Chafee 0%, Jim Webb 0%
Marquette University[434]

Margin of error: ± 6.1%
Sample size: 396

August 13–16, 2015 Hillary Clinton
44%
Bernie Sanders
32%
Joe Biden
12%
Lincoln Chafee 1%, Martin O'Malley 1%, Jim Webb 1%
Marquette University[435]

Margin of error: ± 5.1%
Sample size: 391

April 7–10, 2015 Hillary Clinton
58.2%
Elizabeth Warren
14.3%
Joe Biden
12%
Martin O'Malley 0.9%, Jim Webb 0.9%, Someone else 3.7%, Don't know 8.9%
Public Policy Polling

Margin of error: ± 4.4%
Sample size: 504

March 6–8, 2015 Hillary Clinton
60%
Joe Biden
14%
Elizabeth Warren
12%
Bernie Sanders 5%, Martin O'Malley 1%, Jim Webb 1%, Other/Undecided 7%
Polls in 2014
Poll source Date 1st 2nd 3rd Other
Public Policy Polling

Margin of error: ± 4.1%
Sample size: 579

April 17–20, 2014 Hillary Clinton
57%
Russ Feingold
19%
Joe Biden
8%
Elizabeth Warren 5%, Cory Booker 1%, Andrew Cuomo 1%, Mark Warner 1%, Kirsten Gillibrand 0%, Martin O'Malley 0%, Someone else/Not sure 8%
Polls in 2013
Poll source Date 1st 2nd 3rd Other
Marquette University

Margin of error: ± 5%
Sample size: 392

October 21–27, 2013 Hillary Clinton
64%
Elizabeth Warren
10.8%
Joe Biden
10.6%
Andrew Cuomo 1.9%, Martin O'Malley 0.8%, Someone else 2.1%, Don't know 9.2%
Public Policy Polling

Margin of error: ± 4.6%
Sample size: 449

September 13–16, 2013 Hillary Clinton
50%
Russ Feingold
20%
Joe Biden
11%
Elizabeth Warren 4%, Cory Booker 3%, Andrew Cuomo 2%, Kirsten Gillibrand 0%, Martin O'Malley 0%, Mark Warner 0%, Someone else/Not sure 9%
Marquette University

Margin of error: ± 5.5%
Sample size: 333

May 6–9, 2013 Hillary Clinton
61.5%
Joe Biden
13%
Elizabeth Warren
4.8%
Andrew Cuomo 4.2%, Deval Patrick 1.5%, Martin O'Malley 1.1%, Mark Warner 0.7%, Someone else 1.5%, Don't Know 11%
Public Policy Polling

Margin of error:
Sample size:

February 21–24, 2013 Hillary Clinton
50%
Russ Feingold
25%
Joe Biden
11%
Andrew Cuomo 3%, Elizabeth Warren 2%, Martin O'Malley 1%, Deval Patrick 1%, Brian Schweitzer 0%, Mark Warner 0%, Someone Else/Undecided 8%

Wyoming

Delegate count: 14 Pledged, 4 Unpledged

Winner
Bernie Sanders
Caucus date
April 9, 2016
Poll source Date 1st 2nd
Caucus results March 5, 2016 Bernie Sanders
55.7%
Hillary Clinton
44.3%

No polls were conducted for the Wyoming Democratic caucuses.

District/territories

American Samoa

Delegate count: 6 Pledged, 5 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd Other
Caucus results March 1, 2016 Hillary Clinton
68.4%
Bernie Sanders
25.7%
Other
6.0%

District of Columbia

Delegate count: 20 Pledged, 26 Unpledged

Winner
Hillary Clinton
Primary date
June 14, 2016
Poll source Date 1st 2nd Other
Primary results June 14, 2016 Hillary Clinton
78.7%
Bernie Sanders
21.1%
Other
0.2%

Guam

Delegate count: 7 Pledged, 5 Unpledged

Winner
Hillary Clinton
Primary date
May 7, 2016
Poll source Date 1st 2nd Other
Caucus results May 7, 2016 Hillary Clinton
59.5%
Bernie Sanders
40.5%

Northern Marianas

Delegate count: 6 Pledged, 5 Unpledged

Winner
Hillary Clinton
Primary date
March 1, 2016
Poll source Date 1st 2nd Other
Caucus results March 12, 2016 Hillary Clinton
54.0%
Bernie Sanders
34.4%
Other
11.6%

Puerto Rico

Delegate count: 60 Pledged, 7 Unpledged

Winner
Hillary Clinton
Primary date
June 5, 2016
Poll source Date 1st 2nd Other
Primary results June 5, 2016 Hillary Clinton
60.0%
Bernie Sanders
38.0%
Others 2.0%
Pasquines Polls[436]

Margin of error: ±%
Sample size: 249

May 23-30, 2016 Hillary Clinton
64%
Bernie Sanders
30%
Others / Undecided
6%

Virgin Islands

Delegate count: 7 Pledged, 5 Unpledged

Winner
Hillary Clinton
Caucus date
June 4, 2016
Poll source Date 1st 2nd Other
Caucus results June 4, 2016 Hillary Clinton
84.2%
Bernie Sanders
12.2%

See also

General election polling
Democratic primary polling
Republican primary polling

Notes

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