THE IDAHO COUNTY LAND BRIEF
Land in the
South Clearwater Forested Mountains setting.
Idaho County has 8,477.5 square miles of land in Idaho. 15 mapped landscape regions meet across Idaho County: South Clearwater Forested Mountains, Lochsa-Selway-Clearwater Canyons, Southern Forested Mountains, among others.
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.
Regional context: Idaho Batholith ↗ · Regional mapping across the county footprint
Where the landscape changes
Idaho County intersects 15 mapped regional units. The largest mapped shares are:
- South Clearwater Forested Mountains26.6%
- Lochsa-Selway-Clearwater Canyons13.5%
- Southern Forested Mountains11.4%
- Hot Dry Canyons9.7%
- Lochsa Uplands7.8%
Blue Mountains in Idaho County
The Blue Mountains combine open mountain ranges and dissected volcanic uplands. The Wallowa and Elkhorn high country includes older granitic and metamorphic rocks above the surrounding lava landscape.
Read the regional source ↗Northern Rockies in Idaho County
The Northern Rockies contain rugged ranges, glacial lakes and mixed conifer forests. Moist Pacific influences reach some inland valleys, producing forest communities unlike the drier mountain regions farther south.
Read the regional source ↗Finding your parcel within Idaho County
The atlas lists 9 cities, towns, townships, and Census communities associated with Idaho County, including Elk City, Grangeville, Kamiah. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Idaho County by land and water
The Census records 26.1 square miles of water within Idaho County, or 0.3% of its total area. That share is close to Idaho County’s 0.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Idaho County has 3,382.9 times the land area of nearby Elk City CDP (2.51 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Adams County, Clearwater County, Lemhi County, Lewis County, Nez Perce County, Valley County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

