List of Interstate Highways in South Dakota

Interstate 90 Business marker
Standard South Dakota highway shields
System information
Notes South Dakota highways are generally state-maintained.
Highway names
Interstates Interstate X (I-X)
US Highways U.S. Highway X (US X)
State (State) Highway X (SD X)
System links
  • South Dakota Highways

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-29 252.50406.36 I-29 at the Iowa state line at Dakota DunesI-29 / US 81 at the North Dakota state line north-northwest of Victor 01958-01-011958current  
I-90 412.76664.27 I-90 at the Wyoming state line west-northwest of North SpearfishI-90 at the Minnesota state line north-northeast of Valley Springs  
I-190 1.722.77 US 16 / SD 44 / West Boulevard in Rapid CityI-90 / US 14 / US 16 / SD 79 in Rapid City  
I-229 11.3318.23 I-29 in Sioux FallsI-90 / CR 125 north of Sioux Falls  

Business routes

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

See also

  • South Dakota portal
  • U.S. Roads portal

References

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