THE CORSON COUNTY LAND BRIEF
Land in the
Missouri Plateau setting.
Corson County has 2,469.7 square miles of land in South Dakota. 3 mapped landscape regions meet across Corson County: Missouri Plateau, Moreau Prairie, River Breaks.
Rolling semiarid plains are punctuated by buttes, badlands and river breaks. Much of the regional terrain developed on sandstone, siltstone and shale without the leveling influence of continental glaciers.
Regional context: Northwestern Great Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Corson County intersects 3 mapped regional units. The largest mapped shares are:
- Missouri Plateau39.9%
- Moreau Prairie36%
- River Breaks24.2%
Finding your parcel within Corson County
The atlas lists 14 cities, towns, townships, and Census communities associated with Corson County, including Ridgeland, Custer, Rolling Green. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Corson County by land and water
The Census records 60 square miles of water within Corson County, or 2.4% of its total area. That share is close to Corson County’s 2.4%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Corson County has 819.4 times the land area of nearby Bullhead CDP (3.01 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Campbell County, Dewey County, Perkins County, Walworth County, Ziebach County within South Dakota. A tract near one of these lines should be matched to the county identifier on its own records.

