List of Longest Rivers in The United States By State - South Dakota

South Dakota

1. Missouri River - 2,340 miles (3,770 km)
2. James River - 710 miles (1,140 km)
3. White River - 580 miles (930 km)
4. Little Missouri River - 560 miles (900 km)
5. Big Sioux River - 419 miles (674 km)
6. Cheyenne River - 295 miles (475 km)
7. Belle Fourche River - 290 miles (470 km)
8. Little White River - 234 miles (377 km)
9. Moreau River - 200 miles (320 km)

See also List of rivers of South Dakota.