List of state highways in South Dakota

South Dakota's state highways were assigned in a numbering pattern that followed that of the U.S. Highways followed upon their inception. East–west highways carried even numbers and increased from North to South  – while north–south highways carried odd numbers and increased from east to west. This holds true only for two-digit highways. Three-digit highways follow the odd–even routing, but do not sequentially remain near a "parent" route as a spur or alternate route, instead being more independent of any parent two-digit route.[1]

Standard South Dakota state highway shields
System information
NotesSouth Dakota highways are generally state-maintained.
Highway names
InterstatesInterstate X (I-X)
US HighwaysU.S. Highway X (US X)
State(State) Highway X (SD X)
System links
  • South Dakota Highways

The Bureau of Indian Affairs maintains a set of routes within the reservations of western South Dakota – using the standard BIA shield on green background.[1]

State highways
View of an actual South Dakota state highway sign. The signs enclose the route number within the state's shape on top of a green background.
Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
SD 8 180290 Montana state lineMobridge 01935-01-01193501968-01-01c. 1968 absorbed by SD 20 when extended west across the Missouri River
SD 9 —— —— 01926-01-01192601927-01-011927 became U.S. Highway 16
SD 9 —— —— 01935-01-01193501950-01-011950 was a short state route in Marshall County
SD 10 175.945283.156 SD 1804 in PollockMN 28 at the Minnesota state line southeast of Sisseton 01927-01-011927current
SD 11 77.724125.085 South Franklin Street / East Rose Street in Elk PointMN 269 at the Minnesota state line near Sherman 01926-01-011926current segment between SD 50 and SD 48 is currently not a portion of the highway
SD 12 325523 Mound CityMinnesota state line southeast of Sisseton 01926-01-01192601927-01-011927 redesignated as SD 10
SD 13 23.89138.449 SD 34 east of EganUS 14 north of Elkton 01926-01-011926current
SD 15 67.562108.730 SD 28 west of TorontoCR 17 / CR 34 north of Summit 01926-01-011926current
SD 15A —— MilbankWilmot 01950-01-01c. 195001976-01-011976 originally part of the SD 15 mainline; redesignated as SD 123
SD 15Y 67.562108.730 US 12 in Big Stone CitySD 15 southwest of Shady Beach 01960-01-01c. 196001976-01-011976 redesignated as SD 109
SD 16 —— White ButteBig Stone City 01926-01-01192601927-01-011927 designated as part of US 12
SD 16B —— —— ——
SD 17 2.0003.219 SD 44 south of LennoxCR 122 north of Lennox 01926-01-011926current
SD 18 200320 Montana state lineMobridge 01926-01-01192601935-01-01c. 1935 redesignated as South Dakota Highway 8
SD 19 86.974139.971 N-15 at the Nebraska state line south of VermillionSD 34 southeast of Madison 01926-01-011926current designated as part of US 12
SD 19A 8.16113.134 SD 19/SD 46 south of CentervilleSD 19 west of Centerville 01950-01-011950current originally part of SD 19
SD 20 385.079619.725 Montana state line near Camp CrookMN 40 at the Minnesota state line near Revillo 01930-01-01c. 1930current follows US 212, US 81 and I-29 between two segments of US 12

SD 20 Spur		 —— SD 20 in AkaskaSD 20 in Akaska 01965-01-01c. 196501976-01-011976 Redesignated as SD 144

SD 20 Spur		 0.4580.737 SD 20 near WatertownNorth Lake Drive near Watertown ——
SD 21 9.47015.240 SD 28 west of Lake NordenUS 81 east of Hayti 01926-01-01c. 1926current
SD 22 48.54678.127 CR 181 in HazelMN 68 at the Minnesota state line south of Gary 01926-01-01c. 1926current

SD 22 Spur		 —— —— 01968-01-01c. 196801976-01-011976 redesignated as SD 101
SD 23 —— —— ——
SD 24 148238 Belle FourcheFaith 01926-01-01c. 192601960-01-011960 eliminated by a westward extension of SD 34
SD 24A 2743 Belle FourcheBlack Hills 01940-01-01c. 194001948-01-011948
SD 25 194.524313.056 SD 50 northwest of TaborND 18 at the North Dakota state line north of Claire City 01926-01-011926current gap in route designated as CR 9
SD 26 49.54079.727 SD 47 north of HighmoreUS 281 south of Redfield 01935-01-01c. 1935current
SD 27 —— —Hutchinson 01926-01-01c. 192601935-01-011935 redesignated as part of SD 35
SD 27 42.63968.621 US 12 southeast of AndoverND 32 at the North Dakota state line northeast of Kidder 01976-01-011976current originally northern part of the path of SD 25
SD 28 105.937170.489 US 281 west of HitchcockMN 271 at the Minnesota state line near Astoria 01934-01-01c. 1934current
SD 30 —— Wyoming border southwest of LeadMinnesota border near Elkton 01926-01-01c. 192601927-01-011927
SD 30 17.127.5 CR 6/CR 77 west of WhiteMN 19 at the Minnesota state line northeast of Bushnell 01955-01-01c. 1955current
SD 32 8.613.8 I-29 (via Exit 114)SD 13 in Flandreau ——
SD 34 419.0674.3 WYO 24 at the Wyoming state lineMN 30 at the Minnesota state line ——
SD 35 1931 Near TaborNear Emery 01935-01-01c. 193501976-01-011976
SD 36 9.114.6 US 16A in Custer State ParkSD 79 near Hermosa ——
SD 37 242.0389.5 N-14 at the Nebraska state lineND 1 at the North Dakota state line ——
SD 37A 2.43.9 SD 37 south of TrippUS 18 north of Tripp —— Business loop of highway 37 in Tripp
SD 38 63.4102.0 I-90 Business in MitchellI-29 in Sioux Falls ——
SD 38A —— —— ——
SD 40 37.460.2 US 16A in KeystoneBIA Highway 41 in Red Shirt ——
SD 40A —— —— ——
SD 41 197317 RaviniaNorth Dakota 01926-01-01192601952-01-01c. 1952 absorbed by US 281
SD 42 5.99.5 US 281Aurora-Davison county line ——
SD 42 80.9130.2 SD 37 west of EthanIA 9 at the Iowa state line near Larchwood ——
SD 43 1.11.8 N-11 at the Nebraska state lineUS 18 in Fairfax ——
SD 44 379.0609.9 US 385 near MerrittI-29 near Worthing ——
SD 45 198.0318.7 SD 44 / SD 50 in PlatteND 3 at the North Dakota state line near Ashley ——
SD 46 105.5169.8 US 18 / US 281 in PickstownIA 10 at the Iowa state line near Hawarden ——

SD 46 Spur		 —— —— ——
SD 47 240.9387.7 N-137 at the Nebraska state lineNorth Dakota state line ——
SD 47W —— —— ——
SD 48 12.520.1 I-29 near SpinkIowa state line near Akron ——
SD 49 35.156.5 US 18 / US 183 in ColomeSD 47 ——
SD 50 212.4341.8 SD 34 near Fort ThompsonIA 3 at the Iowa state line near Richland ——
SD 52 28.646.0 SD 37 near SpringfieldUS 81 / SD 50 in Yankton ——
SD 53 16.025.7 293rd Street/306th Avenue near ClearfieldUS 18 near Jordan Junction ——
SD 53 33.153.3 SD 44 near WoodI-90 / US 83 in Vivian ——
SD 54 1626 BonesteelNebraska 01926-01-01c. 192601960-01-01c. 1960
SD 55 —— —— ——
SD 59 5182 NebraskaMurdo 01927-01-01192701935-01-01c. 1935 replaced by US 183
SD 61 —— —— ——
SD 63 20.833.5 US 18 near Parmelee246th avenue near Norris ——
SD 63 146.6235.9 SD 44 south of Corn CreekND 6 at the North Dakota state line near McLaughlin ——
SD 65 70.5113.5 US 212 near DupreeND 31 near McIntosh ——
SD 71 35.657.3 N-2 / N-71 at the Nebraska state line near ArdmoreUS 18 Bypass in Hot Springs ——
SD 73 255.3410.9 N-61 near MerrimanND 49 at the North Dakota state line near Thunder Hawk ——
SD 75 29.447.3 SD 20 near BisonND 8 at the North Dakota state line near Hettinger ——
SD 79 —— —— ——
SD 81 —— —— ——
SD 83 —— —— ——
SD 85 —— —— ——
SD 87 —— —— ——
SD 89 —— —— ——
SD 100 —— —— ——
SD 101 —— —— ——
SD 102 —— —— ——
SD 103 —— —— ——
SD 105 —— —— ——
SD 106 —— —— ——
SD 109 —— —— ——
SD 115 —— —— ——
SD 116 —— —— ——
SD 123 —— —— ——
SD 127 —— —— ——
SD 130 —— —— ——
SD 134 —— —— ——
SD 136 —— —— ——
SD 139 —— —— ——
SD 144 —— —— ——
SD 147 —— —— ——
SD 153 —— —— ——
SD 158 —— —— ——
SD 168 —— —— ——
SD 203 —— —— ——
SD 204 —— —— ——
SD 214 —— —— ——
SD 218 —— —— ——
SD 224 —— —— ——
SD 230 —— —— ——
SD 231 —— —— ——
SD 232 —— —— ——
SD 235 —— —— ——
SD 236 —— —— ——
SD 238 —— —— ——
SD 239 —— —— ——
SD 240 —— —— ——
SD 244 —— —— ——
SD 245 —— —— ——
SD 247 —— —— ——
SD 248 —— —— ——
SD 249 —— —— ——
SD 251 —— —— ——
SD 253 —— —— ——
SD 258 —— —— ——
SD 262 —— —— ——
SD 264 —— —— ——
SD 271 —— —— ——
SD 273 —— —— ——
SD 296 —— —— ——
SD 298 —— Black Hills Ordnance Depot at IglooSD 471 northeast of Igloo —01998-01-011998
SD 314 —— —— ——
SD 324 —— —— ——
SD 365 —— —— ——
SD 377 —— —— ——
SD 391 —— —— ——
SD 407 —— —— ——
SD 423 —— —— ——
SD 435 —— —— ——
SD 437 —— —— ——
SD 439 —— —— ——
SD 443 —— —— ——
SD 445 —— —— ——
SD 471 —— —— ——
SD 473 —— —— ——
SD 514 —— —— ——
SD 1804 126.745203.976 Shore of the Missouri River south of GeddesND 1804 at the North Dakota state line northwest of Pollock 01975-01-011975current consists of 4 segments
SD 1806 —— —— ——

See also
  •  U.S. Roads portal

References
  1. Geelhart, Chris. "The Unofficial South Dakota Highways Page". Retrieved January 17, 2018.
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