List of state highways in South Dakota

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File:SD 20.svg File:SD 240.svg
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 State Trunk Highway System

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.

File:South Dakota Highway 63.JPG
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.

State highways

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
File:SD 8 (1960).svg SD 8 180 290 Montana state line Mobridge 01935-01-011935 01968-01-01c. 1968 Absorbed by SD 20 when extended west across the Missouri River
File:SD 9 (1926).svg SD 9 — — North Dakota state line Britton 01935-01-011935 01950-01-011950 Now an unnumbered county road
File:SD 10.svg SD 10 175.945 283.156 SD 1804 in Pollock MN 28 at the Minnesota state line southeast of Sisseton 01927-01-011927 current
File:SD 11.svg SD 11 77.724 125.085 South Franklin Street / East Rose Street in Elk Point MN 269 at the Minnesota state line near Sherman 01926-01-011926 current Segment between SD 50 and SD 48 is currently not a portion of the highway
File:SD 12 (1926).svg SD 12 325 523 Mound City Minnesota state line southeast of Sisseton 01926-01-011926 01927-01-011927 Redesignated as SD 10
File:SD 13.svg SD 13 23.891 38.449 SD 34 east of Egan US 14 north of Elkton 01926-01-011926 current
File:SD 15.svg SD 15 67.562 108.730 SD 28 west of Toronto CR 17 / CR 34 north of Summit 01926-01-011926 current
File:SD 15A (1960).svg SD 15A 10.486 16.876 US 12 near Marvin SD 15 at Wilmot 01951-01-011951 01976-12-311976[1] Originally part of the SD 15 mainline; redesignated as SD 123
File:SD 15Y (1960).svg SD 15Y 12.167 19.581 US 12 in Big Stone City SD 15 near Hartford Beach State Park 01957-01-011957 01976-12-311976[1] Redesignated as SD 109
File:SD 16 (1926).svg SD 16 — — White Butte Big Stone City 01926-01-011926 01927-01-011927 Designated as part of US 12
File:SD 17.svg SD 17 1.006 1.619 SD 44 at Lennox 278th Street at Lennox 01926-01-011926 current
File:SD 18 (1926).svg SD 18 200 320 Montana state line Mobridge 01926-01-011926 01935-01-01c. 1935 Redesignated as South Dakota Highway 8
File:SD 19.svg SD 19 86.974 139.971 N-15 at the Nebraska state line south of Vermillion SD 34 southeast of Madison 01926-01-011926 current Designated as part of US 12
File:SD 19A.svg SD 19A 8.161 13.134 SD 19/SD 46 south of Centerville SD 19 west of Centerville 01950-01-011950 current Originally part of SD 19
File:SD 20.svg SD 20 385.079 619.725 Montana state line near Camp Crook MN 40 at the Minnesota state line near Revillo 01930-01-011930 current Follows US 212, US 81 and I-29 between two segments
File:SD 20A.svg SD 20A 9.150 14.725 SD 15 / SD 20 near La Bolt CSAH 44 at the Minnesota state line — 01975-07-011975 Redesignated as SD 158
File:Spur plate.svg
File:SD 20 (1960).svg SD 20 Spur 		3.532 5.684 Akaska US 83 / SD 20 near Akaska — 01976-12-311976[1] Redesignated as SD 144
File:Spur plate South Dakota.svg
File:SD 20.svg SD 20 Spur 		0.458 0.737 North Lake Drive near Watertown SD 20 near Watertown — — Listed as SD 20P
File:SD 21.svg SD 21 9.470 15.240 SD 28 west of Lake Norden US 81 east of Hayti 01926-01-011926 current
File:SD 22.svg SD 22 48.546 78.127 CR 181 in Hazel MN 68 at the Minnesota state line south of Gary 01926-01-011926 current
File:Spur plate.svg
File:SD 22 (1960).svg SD 22 Spur 		3.064 4.931 SD 22 near Gary Main Avenue in Gary — 01976-12-311976[1] Redesignated as SD 101
File:SD 23 (1960).svg SD 23 — — — — — 01976-12-311976[1] Redesignated as SD 139
File:SD 24 (1950).svg SD 24 148 238 Belle Fourche Faith 01926-01-011926 01960-01-011960 Eliminated by a westward extension of SD 34
File:SD 24A (1950).svg SD 24A 27 43 Belle Fourche Black Hills 01940-01-011940 01948-01-011948
File:SD 25.svg SD 25 194.524 313.056 SD 50 northwest of Tabor ND 18 at the North Dakota state line north of Claire City 01926-01-011926 current Gap in route designated as CR 9
File:SD 26.svg SD 26 49.540 79.727 SD 47 north of Highmore US 281 south of Redfield 01935-01-011935 current
File:SD 27 (1926).svg SD 27 — — — Hutchinson 01926-01-011926 01935-01-011935 Redesignated as part of SD 35
File:SD 27.svg SD 27 42.639 68.621 US 12 southeast of Andover ND 32 at the North Dakota state line northeast of Kidder 01975-07-011975[1] current Originally northern part of the path of SD 25
File:SD 28.svg SD 28 105.937 170.489 US 281 west of Hitchcock MN 271 at the Minnesota state line near Astoria 01934-01-011934 current
File:SD 30 (1926).svg SD 30 — — Wyoming border southwest of Lead Minnesota border near Elkton 01926-01-011926 01927-01-011927
File:SD 30.svg SD 30 17.077 27.483 CR 6/CR 77 west of White MN 19 at the Minnesota state line northeast of Bushnell 01955-01-011955 current
File:SD 32.svg SD 32 8.643 13.910 I-29 (via Exit 114) SD 13 in Flandreau — —
File:SD 34.svg SD 34 419.010 674.331 WYO 24 at the Wyoming state line MN 30 at the Minnesota state line — —
File:SD 35 (1960).svg SD 35 19 31 Near Tabor Near Emery 01935-01-011935 01976-12-311976[1]
File:SD 36.svg SD 36 9.087 14.624 US 16A in Custer State Park SD 79 near Hermosa — —
File:SD 37.svg SD 37 242 389 N-14 at the Nebraska state line ND 1 at the North Dakota state line — —
File:SD 37A.svg SD 37A 2.4 3.9 SD 37 south of Tripp US 18 north of Tripp — — Business loop of highway 37 in Tripp
File:SD 38.svg SD 38 63.393 102.021 I-90 Business in Mitchell I-29 in Sioux Falls — —
File:SD 38A.svg SD 38A — — SD 38 near Sioux Falls SD 38 in Sioux Falls — 01994-01-011994
File:SD 40.svg SD 40 37.369 60.140 US 16A in Keystone BIA Highway 41 in Red Shirt — —
File:SD 40A (1960).svg SD 40A 2.173 3.497 SD 40 at Interior Badlands National Park Interior entrance gate — — Redesignated as SD 377
File:SD 41 (1950).svg SD 41 197 317 Ravinia North Dakota 01926-01-011926 01952-01-01c. 1952 Absorbed by US 281
File:SD 42.svg SD 42 71.973 115.829 US 281 IA 9 at the Iowa state line near Larchwood — — Three segments
File:SD 43.svg SD 43 1.131 1.820 N-11 at the Nebraska state line US 18 in Fairfax — —
File:SD 44.svg SD 44 379.022 609.977 US 385 near Merritt I-29 near Worthing — —
File:SD 45.svg SD 45 198 319 SD 44 / SD 50 in Platte ND 3 at the North Dakota state line near Ashley — —
File:SD 46.svg SD 46 105.535 169.842 US 18 / US 281 in Pickstown IA 10 at the Iowa state line near Hawarden — —
File:SD 47.svg SD 47 240.866 387.636 N-137 at the Nebraska state line North Dakota state line — —
File:SD 48.svg SD 48 12.469 20.067 I-29 near Spink Iowa state line near Akron — —
File:SD 49.svg SD 49 35.134 56.543 US 18 / US 183 in Colome SD 47 — —
File:SD 50.svg SD 50 212.421 341.858 SD 34 near Fort Thompson IA 3 at the Iowa state line near Richland — —
File:SD 52.svg SD 52 28.567 45.974 SD 37 near Springfield US 81 / SD 50 in Yankton — —
File:SD 53.svg SD 53 67.475 108.590 Nebraska state line near Clearfield I-90 / US 83 in Vivian — — Two segments
File:SD 54 (1950).svg SD 54 16 26 Bonesteel Nebraska 01926-01-011926 01960-01-01c. 1960
File:SD 59 (1926).svg SD 59 51 82 Nebraska Murdo 01927-01-011927 01935-01-01c. 1935 Replaced by US 183
File:SD 63.svg SD 63 167.455 269.493 US 18 near Parmelee ND 6 at the North Dakota state line near McLaughlin — — Two segments
File:SD 65.svg SD 65 70.485 113.435 US 212 near Dupree ND 31 near McIntosh — —
File:SD 71.svg SD 71 34.535 55.579 N-2 / N-71 at the Nebraska state line near Ardmore US 18 Bypass in Hot Springs 01962-01-011962 current
File:SD 73.svg SD 73 255.291 410.851 N-61 near Merriman ND 49 at the North Dakota state line near Thunder Hawk — —
File:SD 75.svg SD 75 29.352 47.237 SD 20 near Bison ND 8 at the North Dakota state line near Hettinger — —
File:SD 79.svg SD 79 213.7 343.9 US 18 / US 385 at Maverick Junction ND 22 at the North Dakota state line — —
File:SD 81.svg SD 81 — — — — — — Redesignated as SD 87
File:SD 83.svg SD 83 — — — — — — Redesignated as US 385
File:SD 85.svg SD 85 — — — — — — Redesignated as SD 83
File:SD 87.svg SD 87 37.894 60.984 US 385 near Pringle US 16 / US 385 near Hill City — —
File:SD 89.svg SD 89 34.5 55.5 US 18 near Minnekahta SD 87 in Custer State Park — —
File:SD 100.svg SD 100 — — I-29 south of Sioux Falls I-90 east of Sioux Falls 02020-01-012020 current Under construction
File:SD 101 (1960).svg SD 101 7.312 11.768 SD 10 / SD 45 near Eureka Long Lake — 01976-12-311976[1] Redesignated as SD 239
File:SD 101.svg SD 101 3.064 4.931 SD 22 near Gary Main Avenue in Gary 01976-12-311976[1] current Formerly SD 22 Spur
File:SD 102 (1960).svg SD 102 18.024 29.007 US 12 near Roscoe SD 47 near Hosmer — 01976-12-311976[1] Redesignated as SD 253
File:SD 103.svg SD 103 — — SD 46 near Beresford Iowa state line at Hudson — 01994-01-011994
File:SD 105 (1960).svg SD 105 25.010 40.250 US 12 near Java CR 55 at the North Dakota state line near Artas — 01976-12-311976[1] Formerly SD 271
File:SD 105.svg SD 105 7.4 11.9 I-29 at North Sioux City I-29 at Jefferson 01980-01-01c. 1980 01998-01-011998
File:SD 106.svg SD 106 4.935 7.942 SD 25 near Claire City SD 127 near Hammer 01975-07-011975[1] current
File:SD 109.svg SD 109 12.167 19.581 US 12 in Big Stone City SD 15 near Hartford Beach State Park 01975-07-011975[1] current Formerly SD 15Y
File:SD 115.svg SD 115 40 64 US 18 near Canton I-29 near Dell Rapids 01980-01-011980 current
File:SD 116.svg SD 116 — — — — — — Became SD 423
File:SD 123.svg SD 123 10.486 16.876 US 12 near Marvin SD 15 at Wilmot 01975-07-011975[1] current Formerly SD 15A
File:SD 127.svg SD 127 37.328 60.074 SD 10 in Sisseton ND 127 at the North Dakota state line 01980-01-011980 current
File:SD 130.svg SD 130 7.111 11.444 US 12 / US 83 / SD 20 in Selby SD 271 in Java 01975-07-011975[1] current
File:SD 134.svg SD 134 — — US 12 near Mina Edmunds–Brown county line near Mina Lake — 02009-01-012009
File:SD 136.svg SD 136 — — SD 37 in Groton US 12 at Groton 01975-07-011975[1] 02004-01-012004
File:SD 139.svg SD 139 — — US 212 near Watertown SD 50 near Watertown 01975-07-011975[1] 02010-01-012010 Formerly SD 23
File:SD 144.svg SD 144 3.532 5.684 Akaska US 83 / SD 20 near Akaska 01975-07-011975[1] current Formerly SD 20 Spur
File:SD 147.svg SD 147 — — — — — — Redesignated as SD 49
File:SD 153.svg SD 153 2.369 3.813 SD 52 near Yankton SD 50 near Yankton — —
File:SD 158.svg SD 158 9.150 14.725 SD 15 / SD 20 near La Bolt CSAH 44 at the Minnesota state line 01975-07-011975[1] current Formerly SD 20A
File:SD 168.svg SD 168 6.931 11.154 US 85 near Belle Fourche SD 79 near Castle Rock — —
File:SD 203.svg SD 203 0.957 1.540 SD 258 near Plankinton State Training School near Plankinton — —
File:SD 204.svg SD 204 2.131 3.430 SD 1806 at Lake Oahe SD 1804 at Lake Oahe — — Travels over Oahe Dam
File:SD 214.svg SD 214 — — Bad River Road near Wendte US 83 near Fort Pierre — 01991-01-011991
File:SD 218.svg SD 218 8.680 13.969 I-29 near Brookings SD 13 near Elkton — — Redesignated as SD 324
File:SD 224.svg SD 224 7.962 12.814 Alpena SD 37 near Huron — —
SD 228 — — I-90 at Box Elder Near Box Elder 01975-07-011975[1] — Former US 14/US 16
File:SD 230.svg SD 230 — — I-90 BL at Rapid City Box Elder 01975-07-011975[1] 02006-01-012006 Former US 14/US 16
File:SD 231.svg SD 231 7.040 11.330 I-90 near Black Hawk SD 44 at Rapid City — —
File:SD 232.svg SD 232 — — SD 79 at Rapid City SD 445 at Rapid City 01975-07-011975[1] 01994-01-011994
File:SD 235.svg SD 235 — — — — — — Redesignated as US 16 Truck
File:SD 236.svg SD 236 — — Lake Herman State Park SD 34 near Madison — 02006-01-012006
File:SD 238.svg SD 238 — — SD 79 at Rapid City SD 44 at Rapid City 01975-07-011975[1] 02006-01-012006
File:SD 239.svg SD 239 7.312 11.768 SD 10 / SD 45 near Eureka Long Lake 01975-07-011975[1] current Formerly SD 101
File:SD 240.svg SD 240 40.033 64.427 I-90 / US 14 at Wall I-90 near Cottonwood — — Passes through Badlands National Park
File:SD 244.svg SD 244 10.457 16.829 US 16 / US 385 near Hill City US 16A near Keystone 01975-07-011975[1] current Provides access to Mount Rushmore
File:SD 245.svg SD 245 — — SD 34 / SD 50 near Fort Thompson SD 34 / SD 47 near Stephan — 01985-01-011985
File:SD 247.svg SD 247 23.023 37.052 US 12 at Roscoe SD 10 / SD 45 near Eureka 01975-07-011975[1] current
File:SD 248.svg SD 248 117.108 188.467 SD 240 near Badlands National Park I-90 at Reliance — — Former US 16
File:SD 249.svg SD 249 1.055 1.698 SD 47 at Fort Thompson SD 34 near Fort Thompson 01975-07-011975[1] current
File:SD 251.svg SD 251 15.800 25.428 Nebraska state line near Gregory US 18 / SD 47 at Gregory — —
File:SD 253.svg SD 253 18.024 29.007 US 12 near Roscoe SD 47 near Hosmer 01975-07-011975[1] current Formerly SD 102
File:SD 258.svg SD 258 2.552 4.107 I-90 at Plankinton US 281 near Plankinton — —
File:SD 262.svg SD 262 17.563 28.265 I-90 near Alexandria SD 42 at Bridgewater — — Former US 16
File:SD 264.svg SD 264 — — SD 11 at Brandon Minnesota state line near Valley Springs — 01999-01-011999 Former US 16
File:SD 271.svg SD 271 25.010 40.250 US 12 near Java CR 55 at the North Dakota state line near Artas 01975-07-011975[1] current Formerly SD 105
File:SD 273.svg SD 273 12.723 20.476 I-90 near Kennebec SD 1806 near Lower Brule 01975-07-011975[1] current
File:SD 296.svg SD 296 3 4.8 Turner—Lincoln near Centerville SD 17 near Centerville — 01991-01-011991
File:SD 298.svg SD 298 — — Black Hills Ordnance Depot at Igloo SD 471 near Igloo — 01998-01-011998
File:SD 314.svg SD 314 3.751 6.037 SD 50 near Yankton Yankton city limits — —
File:SD 324.svg SD 324 8.680 13.969 I-29 near Brookings SD 13 near Elkton — — Former SD 218
File:SD 365.svg SD 365 1.5 2.4 US 18 / SD 73 at Martin North of Martin — 01995-01-011995 Former US 18/SD 73
File:SD 377.svg SD 377 2.173 3.497 SD 44 at Interior Badlands National Park Interior entrance gate — —
File:SD 391.svg SD 391 3.362 5.411 N-27 at the Nebraska state line near Denby US 18 near Denby — —
File:SD 407.svg SD 407 1.786 2.874 N-87 at the Nebraska state line near Pine Ridge US 18 at Pine Ridge — —
File:SD 423.svg SD 423 0.5 0.80 New Underwood I-90 near New Underwood — 01998-01-011998
File:SD 435.svg SD 435 — — SD 230 at Box Elder I-90 at Box Elder — 01998-01-011998
File:SD 437.svg SD 437 — — SD 238 at Rapid City I-90 at Rapid City 01975-07-011975[1] 01994-01-011994 Now part of US 16 Truck
File:SD 439.svg SD 439 — — SD 79 at Rapid City I-90 BL at Rapid City 01975-07-011975[1] 01990-01-011990
File:SD 443.svg SD 443 — — SD 44 at Rapid City SD 79 at Rapid City 01975-07-011975[1] 02005-01-012005
File:SD 445.svg SD 445 2.372 3.817 SD 231 at Rapid City I-90 near Rapid City 01975-07-011975[1] current
File:SD 471.svg SD 471 21.981 35.375 SD 71 near Rumford US 18 at Edgemont — —
File:SD 473.svg SD 473 3.168 5.098 US 14A / US 85 near Lead Stewart Slope Road near Trojan — —
File:SD 514.svg SD 514 — — — — — — Redesignated as parts of SD 1804 and SD 1806; became all of SD 204
File:SD 1804.svg SD 1804 126.745 203.976 Shore of the Missouri River south of Geddes ND 1804 at the North Dakota state line northwest of Pollock 01975-07-011975[1] current Four segments
File:SD 1806.svg SD 1806 122.603 197.310 SD 273 north of Kennebec Mission Ridge Road near Mission Ridge 01975-07-011975[1] current
  •       Former

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.30 1.31 1.32 1.33 1.34 1.35 1.36 "Highway Division Makes Road Numbering Changes". Argus-Leader. Sioux Falls. March 20, 1975. p. 2. Retrieved March 18, 2020 – via Newspapers.com. Open access icon
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