List of Interstate Highways in South Dakota

Interstate Highways in South Dakota
Interstate 90 Business marker
Standard South Dakota highway shields
Map
Interstate Highways highlighted in red
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

The Interstate Highways in South Dakota are the segments of the Dwight D. Eisenhower National System of Interstate and Defense Highways owned and maintained by the South Dakota Department of Transportation in the US state of South Dakota.

Mainline highways

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 the Iowa state line at Dakota Dunes I-29 / US 81 at the North Dakota state line north-northwest of Victor 01958-01-011958 current  
I-90 412.76 664.27 I-90 at the Wyoming state line west-northwest of North Spearfish I-90 at the Minnesota state line north-northeast of Valley Springs — —  
I-190 1.72 2.77 US 16 / SD 44 / West Boulevard in Rapid City I-90 / US 14 / US 16 / SD 79 in Rapid City 01962-01-011962 current  
I-229 11.33 18.23 I-29 in Sioux Falls I-90 / CR 125 north of Sioux Falls 01966-01-011966 current  

Business routes

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-29 BL — — — — — — Serves Elk Point
I-29 BS — — — — — — Serves Sioux Falls
I-29 BS — — — — — — Serves Brookings
I-90 BL — — — — — — Serves Spearfish
I-90 BL — — — — — — Serves Sturgis
I-90 BL — — — — — — Serves Rapid City
I-90 BL — — — — — — Serves Wall
I-90 BL — — — — — — Serves Kadoka
I-90 BL — — — — — — Serves Murdo
I-90 BL — — — — — — Serves Presho
I-90 BL — — — — — — Serves Chamberlain
I-90 BL — — — — — — Serves Mitchell
I-90 BS — — — — — — Serves Sioux Falls
I-229 Dwtn. — — — — — — Serves Sioux Falls

See also

References