Marion County, Illinois

Marion County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 39,437.[1] Its county seat is Salem.[2]

For counties with a similar name, see Marion County (disambiguation).
Not to be confused with Marion, Illinois.

Marion County
U.S. county
Location within the U.S. state of Illinois
Illinois's location within the U.S.
Coordinates: 38°39′N 88°55′W
Country United States
State Illinois
Founded1823
Named forFrancis Marion
SeatSalem
Largest cityCentralia
Area
 • Total576 sq mi (1,490 km2)
 • Land572 sq mi (1,480 km2)
 • Water3.7 sq mi (10 km2)  0.6%
Population
 (2010)
 • Total39,437
 • Estimate 
(2018)
37,620
 • Density68/sq mi (26/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district15th

Marion County comprises the Centralia, IL Micropolitan Statistical Area, which is included in the St. Louis-St. Charles-Farmington, MO-IL Combined Statistical Area.

History

Marion County was organized on 24 January 1823 from portions of Jefferson and Fayette counties. It was named in honor of Revolutionary War Gen. Francis Marion, the "Swamp Fox".[3]

  • Marion County at the time of its creation in 1823

Geography

According to the U.S. Census Bureau, the county has a total area of 576 square miles (1,490 km2), of which 572 square miles (1,480 km2) is land and 3.7 square miles (9.6 km2) (0.6%) is water.[4]

The southwest corner of Marion County is the intersection of the Baseline with the Third Principal Meridian, the point of origin for the third survey of the Northwest Territory under the Land Ordinance of 1785. The origin is marked with a boulder south of Centralia just off U.S. 51.

Climate and weather
Salem, Illinois
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
2.5
 
 
37
18
 
 
2.5
 
 
43
22
 
 
4
 
 
54
33
 
 
4
 
 
65
44
 
 
4.4
 
 
75
54
 
 
4.2
 
 
84
63
 
 
3.9
 
 
88
68
 
 
3.4
 
 
87
66
 
 
3.2
 
 
80
57
 
 
3.1
 
 
69
45
 
 
4.1
 
 
54
34
 
 
3.3
 
 
42
24
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel[5]

In recent years, average temperatures in the county seat of Salem have ranged from a low of 18 °F (−8 °C) in January to a high of 88 °F (31 °C) in July, although a record low of −23 °F (−31 °C) was recorded in January 1994 and a record high of 105 °F (41 °C) was recorded in August 1983. Average monthly precipitation ranged from 2.46 inches (62 mm) in January to 4.37 inches (111 mm) in May.[5]

Major highways

Adjacent counties

Demographics
Historical population
CensusPop.%±
18302,125—
18404,742123.2%
18506,72041.7%
186012,73989.6%
187020,62261.9%
188023,68614.9%
189024,3412.8%
190030,44625.1%
191035,09415.3%
192037,4976.8%
193035,635−5.0%
194047,98934.7%
195041,700−13.1%
196039,349−5.6%
197038,986−0.9%
198043,52311.6%
199041,561−4.5%
200041,6910.3%
201039,437−5.4%
2018 (est.)37,620[6]−4.6%
U.S. Decennial Census[7]
1790-1960[8] 1900-1990[9]
1990-2000[10] 2010-2013[1]

As of the 2010 United States Census, there were 39,437 people, 16,148 households, and 10,746 families residing in the county.[11] The population density was 68.9 inhabitants per square mile (26.6/km2). There were 18,296 housing units at an average density of 32.0 per square mile (12.4/km2).[4] The racial makeup of the county was 93.1% white, 3.9% black or African American, 0.6% Asian, 0.3% American Indian, 0.4% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 1.4% of the population.[11] In terms of ancestry, 27.5% were German, 15.8% were Irish, 13.6% were English, and 10.8% were American.[12]

Of the 16,148 households, 30.9% had children under the age of 18 living with them, 48.9% were married couples living together, 12.8% had a female householder with no husband present, 33.5% were non-families, and 28.8% of all households were made up of individuals. The average household size was 2.40 and the average family size was 2.91. The median age was 41.4 years.[11]

The median income for a household in the county was $38,974 and the median income for a family was $50,518. Males had a median income of $41,428 versus $28,042 for females. The per capita income for the county was $20,493. About 12.2% of families and 16.5% of the population were below the poverty line, including 23.9% of those under age 18 and 9.6% of those age 65 or over.[13]

Communities

Cities

Villages

Census-designated places
  • Cartter
  • Fairman
  • Finney Heights
  • Glen Ridge
  • Helm
  • Slap Out
  • Suburban

Townships

Marion County is divided into seventeen townships:

Politics

Initially a strongly Democratic anti-Yankee county, Marion County has undergone two transitions. Between 1912 and 2004 it was a perfect bellwether apart from the Catholicism-influenced 1960 election when substantial anti-Catholic voting by its largely southern white population caused it to support Republican Richard Nixon. Since the beginning of the twenty-first century, strong opposition to the Democratic Party's liberal views on social issues has transformed the county into a powerfully Republican one,[14] with Hillary Clinton receiving a vote share over twelve percent smaller than any pre-2010 Democratic presidential nominee.

Presidential elections results
Presidential elections results[15]
Year Republican Democratic Third parties
2016 69.4% 11,859 25.6% 4,369 5.1% 870
2012 58.5% 9,248 39.4% 6,225 2.2% 347
2008 49.9% 8,691 47.9% 8,345 2.2% 374
2004 54.7% 9,413 44.7% 7,694 0.7% 117
2000 49.5% 8,240 48.4% 8,068 2.1% 355
1996 38.1% 5,999 49.4% 7,792 12.5% 1,972
1992 30.5% 5,764 51.2% 9,669 18.3% 3,450
1988 50.1% 8,695 49.5% 8,592 0.5% 86
1984 59.7% 11,300 40.1% 7,599 0.2% 46
1980 58.7% 10,969 37.4% 6,990 3.9% 719
1976 46.6% 8,729 52.5% 9,834 0.8% 157
1972 60.6% 10,755 39.3% 6,968 0.2% 31
1968 46.1% 8,134 43.8% 7,737 10.1% 1,778
1964 36.4% 7,060 63.7% 12,363
1960 54.9% 11,121 45.0% 9,116 0.1% 13
1956 55.8% 10,813 44.1% 8,551 0.1% 21
1952 53.6% 10,804 46.3% 9,317 0.1% 19
1948 46.2% 7,798 52.6% 8,878 1.2% 208
1944 47.9% 9,408 51.3% 10,079 0.8% 153
1940 42.7% 10,461 56.4% 13,807 0.9% 208
1936 42.8% 8,321 55.6% 10,820 1.6% 305
1932 36.1% 6,276 62.1% 10,791 1.8% 313
1928 60.5% 9,110 38.7% 5,823 0.8% 119
1924 44.0% 5,889 35.6% 4,768 20.4% 2,724
1920 52.1% 6,620 34.2% 4,351 13.7% 1,744
1916 43.0% 6,438 52.7% 7,892 4.3% 646
1912 20.1% 1,586 44.3% 3,493 35.6% 2,813
1908 43.1% 3,435 50.2% 4,001 6.6% 527
1904 47.3% 3,190 36.9% 2,490 15.9% 1,071
1900 43.9% 3,221 53.5% 3,928 2.6% 191
1896 42.3% 2,870 56.6% 3,835 1.1% 77
1892 39.9% 2,324 46.5% 2,709 13.6% 794

See also

References
  1. "State & County QuickFacts". United States Census Bureau. Archived from the original on June 7, 2011. Retrieved July 7, 2014.
  2. "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  3. Gannett, Henry (1905). The Origin of Certain Place Names in the United States. U.S. Government Printing Office. p. 200.
  4. "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Archived from the original on February 12, 2020. Retrieved July 12, 2015.
  5. "Monthly Averages for Salem, Illinois". The Weather Channel. Archived from the original on October 23, 2012. Retrieved January 27, 2011.
  6. "Population and Housing Unit Estimates". Archived from the original on May 29, 2017. Retrieved November 6, 2019.
  7. "U.S. Decennial Census". United States Census Bureau. Retrieved July 7, 2014.
  8. "Historical Census Browser". University of Virginia Library. Archived from the original on August 11, 2012. Retrieved July 7, 2014.
  9. "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Archived from the original on April 24, 2014. Retrieved July 7, 2014.
  10. "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Archived (PDF) from the original on December 18, 2014. Retrieved July 7, 2014.
  11. "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 12, 2015.
  12. "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 12, 2015.
  13. "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 12, 2015.
  14. Cohn, Nate; ‘Demographic Shift: Southern Whites’ Loyalty to G.O.P. Nearing That of Blacks to Democrats’ Archived 2017-07-28 at the Wayback Machine, New York Times, April 24, 2014
  15. Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Archived from the original on March 23, 2018. Retrieved May 1, 2018.

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