THE MELLETTE COUNTY LAND BRIEF
Land in the
Subhumid Pierre Shale Plains setting.
Mellette County has 1,307.3 square miles of land in South Dakota. 4 mapped landscape regions meet across Mellette County: Subhumid Pierre Shale Plains, River Breaks, Keya Paha Tablelands, among others.
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
Mellette County intersects 4 mapped regional units. The largest mapped shares are:
- Subhumid Pierre Shale Plains42.6%
- River Breaks25.9%
- Keya Paha Tablelands25.5%
- White River Badlands6%
Finding your parcel within Mellette County
The atlas lists 19 cities, towns, townships, and Census communities associated with Mellette County, including Prospect, Cody, Bad Nation. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Mellette County by land and water
The Census records 3.56 square miles of water within Mellette County, or 0.3% of its total area. That share is close to Mellette County’s 0.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Mellette County has 2,509.2 times the land area of nearby White River city (0.52 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bennett County, Jackson County, Jones County, Lyman County, Todd County, Tripp County within South Dakota. A tract near one of these lines should be matched to the county identifier on its own records.

