THE TRIPP COUNTY LAND BRIEF
Land in the
Subhumid Pierre Shale Plains setting.
Tripp County has 1,612.3 square miles of land in South Dakota. 5 mapped landscape regions meet across Tripp County: Subhumid Pierre Shale Plains, Keya Paha Tablelands, Ponca Plains, 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
Tripp County intersects 5 mapped regional units. The largest mapped shares are:
- Subhumid Pierre Shale Plains39.3%
- Keya Paha Tablelands24.7%
- Ponca Plains20%
- River Breaks10.3%
- Southern River Breaks5.8%
Northwestern Glaciated Plains in Tripp County
Glaciated plains bridge the wetter eastern prairie and the drier, more broken Great Plains. Numerous prairie potholes and other seasonal or persistent wetlands are characteristic regional landforms.
Read the regional source ↗Finding your parcel within Tripp County
The atlas lists 48 cities, towns, townships, and Census communities associated with Tripp County, including Greenwood, Star Valley, Curlew. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Tripp County by land and water
The Census records 5.15 square miles of water within Tripp County, or 0.3% of its total area. That share is close to Tripp County’s 0.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Tripp County has 703.4 times the land area of nearby Winner city (2.29 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Gregory County, Lyman County, Mellette County, Todd County within South Dakota. A tract near one of these lines should be matched to the county identifier on its own records.

