THE STILLWATER COUNTY LAND BRIEF
Land in the
Unglaciated Montana High Plains setting.
Stillwater County has 1,796.5 square miles of land in Montana. 8 mapped landscape regions meet across Stillwater County: Unglaciated Montana High Plains, Non-calcareous Foothill Grassland, Pine Scoria Hills, 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
Stillwater County intersects 8 mapped regional units. The largest mapped shares are:
- Unglaciated Montana High Plains48.1%
- Non-calcareous Foothill Grassland21.9%
- Pine Scoria Hills10.8%
- Gneissic-Schistose Forested Mountains8.8%
- Alpine Zone5.7%
Middle Rockies in Stillwater County
Forested mountain ranges rise above grassy or shrubby intermountain valleys. The Middle Rockies combine alpine high country, partly wooded foothills and valleys supplied by mountain streams.
Read the regional source ↗Finding your parcel within Stillwater County
The atlas lists 7 cities, towns, townships, and Census communities associated with Stillwater County, including Absarokee, Park City, Columbus. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Stillwater County by land and water
The Census records 9.24 square miles of water within Stillwater County, or 0.5% of its total area. That share is close to Stillwater County’s 0.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Stillwater County has 1,308.5 times the land area of nearby Columbus town (1.37 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Carbon County, Golden Valley County, Park County, Sweet Grass County, Yellowstone County within Montana. A tract near one of these lines should be matched to the county identifier on its own records.

