List of South Dakota numbered highways

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SD 63.svg SD 101.svg
Standard South Dakota highway shields
Two digits: 24 in x 24 in (610 mm x 610 mm)
Three digits: 30 in x 24 in (900 mm x 610 mm)
System information
Notes: South Dakota highways are generally state-maintained.
Highway names
Interstates: Interstate X (I-X)
US Routes: U.S. Highway X (US X)
State: (State) Highway X (SD X)

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 2-digit highways. 3-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 2d route.[1]

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]

Interstate Highways[edit]

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-29 252.50 406.36 I-29 at Dakota Dunes I-29 / US 81 near New Effington 1958 current  
I-90 412.76 664.27 I-90 near Spearfish I-90 near Valley Springs  
I-190 1.72 2.77 I-90 in Rapid City SD 44 in Rapid City  
I-229 11.33 18.23 I-29 in Sioux Falls I-90 / CR 125 near Sioux Falls  

U.S. Highways[edit]

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
US 12 US 12 near Lemmon US 12 at Big Stone City  
US 14 439.75 707.71 I-90/US 14 near Spearfish US 14 near Elkton  
US 14A  
US 16 69.00 111.04 US 16 near Mount Rushmore I 90/I 190/US 14 in Rapid City  
US 16A 36.971 59.499 US 16/US 385/SD 89 in Custer US 16 near Keystone  
US 18 US 18 near Edgemont US 18 near Canton  
US 77  
US 81 US 81 at Yankton I-29/US 81 near New Effington  
US 83 US 83 near Olsonville US 83 near Herreid  
US 85 US 85 in the Black Hills region US 85 near Ludlow  
US 85A  
US 85E  
US 183 75.17 120.97 US 183 near Wewela I-90 near Presho  
US 212 US 212 near Belle Fourche US 212 east of Watertown  
US 216  
US 281 US 281 in Gregory County US 281 north of Frederick  
US 385 US 385 south of Oelrichs US 85 in Deadwood  

State highways[edit]

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.
Routes in italics are no longer in service
SD 8.svg South Dakota Highway 8
SD 9.svg South Dakota Highway 9
SD 10.svg South Dakota Highway 10
SD 11.svg South Dakota Highway 11
SD 12.svg South Dakota Highway 12
SD 13.svg South Dakota Highway 13
SD 15.svg South Dakota Highway 15
SD 15A.svg South Dakota Highway 15A
SD 15Y.svg South Dakota Highway 15Y
SD 16.svg South Dakota Highway 16
SD 16B.svg South Dakota Highway 16B
SD 17.svg South Dakota Highway 17
SD 18.svg South Dakota Highway 18
SD 19.svg South Dakota Highway 19
SD 19A.svg South Dakota Highway 19A
SD 20.svg South Dakota Highway 20
Spur plate.svg
SD 20.svg South Dakota Highway 20 Spur
SD 20A.svg South Dakota Highway 20A
SD 21.svg South Dakota Highway 21
SD 22.svg South Dakota Highway 22
SD 22.svg South Dakota Highway 22 Spur
SD 23.svg South Dakota Highway 23
SD 24.svg South Dakota Highway 24
SD 24A.svg South Dakota Highway 24A
SD 25.svg South Dakota Highway 25
SD 26.svg South Dakota Highway 26
SD 27.svg South Dakota Highway 27
SD 28.svg South Dakota Highway 28
SD 30.svg South Dakota Highway 30
SD 32.svg South Dakota Highway 32
SD 34.svg South Dakota Highway 34
SD 35.svg South Dakota Highway 35
SD 36.svg South Dakota Highway 36
SD 37.svg South Dakota Highway 37
SD 37A.svg South Dakota Highway 37A
SD 38.svg South Dakota Highway 38
SD 38A.svg South Dakota Highway 38A
SD 40.svg South Dakota Highway 40
SD 40A.svg South Dakota Highway 40A
SD 41.svg South Dakota Highway 41
SD 42.svg South Dakota Highway 42
SD 43.svg South Dakota Highway 43
SD 44.svg South Dakota Highway 44
SD 45.svg South Dakota Highway 45
SD 46.svg South Dakota Highway 46
SD 46.svg South Dakota Highway 46 Spur
SD 47.svg South Dakota Highway 47
SD 47W.svg South Dakota Highway 47W
SD 48.svg South Dakota Highway 48
SD 49.svg South Dakota Highway 49
SD 50.svg South Dakota Highway 50
SD 52.svg South Dakota Highway 52
SD 53.svg South Dakota Highway 53
SD 54.svg South Dakota Highway 54
SD 55.svg South Dakota Highway 55
SD 59.svg South Dakota Highway 59
SD 61.svg South Dakota Highway 61
SD 63.svg South Dakota Highway 63
SD 65.svg South Dakota Highway 65
SD 71.svg South Dakota Highway 71
SD 73.svg South Dakota Highway 73
SD 75.svg South Dakota Highway 75
SD 79.svg South Dakota Highway 79
SD 81.svg South Dakota Highway 81
SD 83.svg South Dakota Highway 83
SD 85.svg South Dakota Highway 85
SD 87.svg South Dakota Highway 87
SD 89.svg South Dakota Highway 89
SD 100.svg South Dakota Highway 100
SD 101.svg South Dakota Highway 101
SD 102.svg South Dakota Highway 102
SD 103.svg South Dakota Highway 103
SD 105.svg South Dakota Highway 105
SD 106.svg South Dakota Highway 106
SD 109.svg South Dakota Highway 109
SD 115.svg South Dakota Highway 115
SD 116.svg South Dakota Highway 116
SD 123.svg South Dakota Highway 123
SD 127.svg South Dakota Highway 127
SD 130.svg South Dakota Highway 130
SD 134.svg South Dakota Highway 134
SD 136.svg South Dakota Highway 136
SD 139.svg South Dakota Highway 139
SD 144.svg South Dakota Highway 144
SD 147.svg South Dakota Highway 147
SD 153.svg South Dakota Highway 153
SD 158.svg South Dakota Highway 158
SD 168.svg South Dakota Highway 168
SD 203.svg South Dakota Highway 203
SD 204.svg South Dakota Highway 204
SD 214.svg South Dakota Highway 214
SD 218.svg South Dakota Highway 218
SD 224.svg South Dakota Highway 224
SD 230.svg South Dakota Highway 230
SD 232.svg South Dakota Highway 232
SD 235.svg South Dakota Highway 235
SD 236.svg South Dakota Highway 236
SD 238.svg South Dakota Highway 238
SD 239.svg South Dakota Highway 239
SD 240.svg South Dakota Highway 240
SD 244.svg South Dakota Highway 244
SD 245.svg South Dakota Highway 245
SD 247.svg South Dakota Highway 247
SD 248.svg South Dakota Highway 248
SD 249.svg South Dakota Highway 249
SD 251.svg South Dakota Highway 251
SD 253.svg South Dakota Highway 253
SD 258.svg South Dakota Highway 258
SD 262.svg South Dakota Highway 262
SD 264.svg South Dakota Highway 264
SD 271.svg South Dakota Highway 271
SD 273.svg South Dakota Highway 273
SD 296.svg South Dakota Highway 296
SD 298.svg South Dakota Highway 298
SD 314.svg South Dakota Highway 314
SD 324.svg South Dakota Highway 324
SD 365.svg South Dakota Highway 365
SD 377.svg South Dakota Highway 377
SD 391.svg South Dakota Highway 391
SD 407.svg South Dakota Highway 407
SD 423.svg South Dakota Highway 423
SD 435.svg South Dakota Highway 435
SD 437.svg South Dakota Highway 437
SD 439.svg South Dakota Highway 439
SD 443.svg South Dakota Highway 443
SD 445.svg South Dakota Highway 445
SD 471.svg South Dakota Highway 471
SD 473.svg South Dakota Highway 473
SD 514.svg South Dakota Highway 514
SD 1804.svg South Dakota Highway 1804
SD 1806.svg South Dakota Highway 1806

See also[edit]

References[edit]

  1. ^ a b Geelhart, Chris. "Unofficial South Dakota Highways Page". Retrieved 2007-02-25. 

External links[edit]