THE CUSTER COUNTY LAND BRIEF
Land in the
Montana Central Grasslands setting.
Custer County has 3,783.3 square miles of land in Montana. 3 mapped landscape regions meet across Custer County: Montana Central Grasslands, River Breaks, Pine Scoria Hills.
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
Custer County intersects 3 mapped regional units. The largest mapped shares are:
- Montana Central Grasslands59.3%
- River Breaks32.7%
- Pine Scoria Hills8%
Finding your parcel within Custer County
The atlas lists 2 cities, towns, townships, and Census communities associated with Custer County, including Miles City, Ismay. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Custer County by land and water
The Census records 9.89 square miles of water within Custer County, or 0.3% of its total area. That share is close to Custer County’s 0.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Custer County has 1,125.3 times the land area of nearby Miles City city (3.36 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Carter County, Fallon County, Garfield County, Powder River County, Prairie County, Rosebud County within Montana. A tract near one of these lines should be matched to the county identifier on its own records.

