Southeast South Dakota Most populous, includes South Dakota's largest city (Sioux Falls) and the junction of Interstate Highways 90 and 29 |
Glacial Lakes Northeast corner, largely agricultural landscape, home to numerous lakes and the Coteau des Prairies |
Great Lakes Central area bordering the Missouri river |
Badlands and Black Hills Western quarter of the state, home to the big rugged national parks, forests, grasslands, frontier towns, Mount Rushmore and Crazy Horse, and the state's largest Indian Reservations |