THE FERGUS COUNTY LAND BRIEF
Land in the
Montana Central Grasslands setting.
Fergus County has 4,339.3 square miles of land in Montana. 9 mapped landscape regions meet across Fergus County: Montana Central Grasslands, Missouri Breaks Woodland-Scrubland, Judith Basin Grassland, 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
Fergus County intersects 9 mapped regional units. The largest mapped shares are:
- Montana Central Grasslands41.1%
- Missouri Breaks Woodland-Scrubland20.4%
- Judith Basin Grassland15.3%
- Limy Foothill Savanna8.6%
- Non-calcareous Foothill Grassland7.8%
Middle Rockies in Fergus 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 Fergus County
The atlas lists 17 cities, towns, townships, and Census communities associated with Fergus County, including Lewistown, Roy, Lewistown Heights. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Fergus County by land and water
The Census records 10.7 square miles of water within Fergus County, or 0.2% of its total area. That share is close to Fergus County’s 0.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Fergus County has 10,234.3 times the land area of nearby Warm Spring Creek CDP (0.42 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Blaine County, Chouteau County, Golden Valley County, Judith Basin County, Musselshell County, Petroleum County, Phillips County, Wheatland County within Montana. A tract near one of these lines should be matched to the county identifier on its own records.

