THE ELMORE COUNTY LAND BRIEF
Land in the
Mountain Home Uplands setting.
Elmore County has 3,075.1 square miles of land in Idaho. 8 mapped landscape regions meet across Elmore County: Mountain Home Uplands, Southern Forested Mountains, Foothill Shrublands-Grasslands, among others.
The Snake River Plain is lower and gentler than its surrounding mountains. Alluvial valleys, sagebrush-covered plains, low hills and scattered lava fields form its principal landscape patterns.
Regional context: Snake River Plain ↗ · Regional mapping across the county footprint
Where the landscape changes
Elmore County intersects 8 mapped regional units. The largest mapped shares are:
- Mountain Home Uplands37.7%
- Southern Forested Mountains33.9%
- Foothill Shrublands-Grasslands13.3%
- Semiarid Foothills8%
- High Idaho Batholith2.9%
Idaho Batholith in Elmore County
A deeply cut mountainous plateau forms the Idaho Batholith. Granitic terrain supports conifer forests, while deep canyons introduce warmer settings with pine, shrubs and grasses.
Read the regional source ↗Finding your parcel within Elmore County
The atlas lists 4 cities, towns, townships, and Census communities associated with Elmore County, including Mountain Home AFB, Mountain Home, Glenns Ferry. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Elmore County by land and water
The Census records 26.4 square miles of water within Elmore County, or 0.9% of its total area. That share is close to Elmore County’s 0.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Elmore County has 424.6 times the land area of nearby Mountain Home city (7.24 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Ada County, Blaine County, Boise County, Camas County, Custer County, Gooding County, Owyhee County, Twin Falls County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

