THE NEZ PERCE COUNTY LAND BRIEF
Land in the
Dissected Loess Uplands setting.
Nez Perce County has 848.3 square miles of land in Idaho. 8 mapped landscape regions meet across Nez Perce County: Dissected Loess Uplands, Canyons and Dissected Uplands, Grassy Potlatch Ridges, among others.
Basalt underlies this dry plateau of grassland and sagebrush. Windblown soils cover some uplands, while ancient flood paths exposed rock across the region's scabland terrain.
Regional context: Columbia Plateau ↗ · Regional mapping across the county footprint
Where the landscape changes
Nez Perce County intersects 8 mapped regional units. The largest mapped shares are:
- Dissected Loess Uplands26.2%
- Canyons and Dissected Uplands17.2%
- Grassy Potlatch Ridges16.5%
- Lower Clearwater Canyons15.1%
- Canyons and Dissected Highlands9.7%
Blue Mountains in Nez Perce 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 Nez Perce 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 Nez Perce County
The atlas lists 5 cities, towns, townships, and Census communities associated with Nez Perce County, including Lewiston, Sweetwater, Lapwai. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Nez Perce County by land and water
The Census records 8.21 square miles of water within Nez Perce County, or 1% of its total area. That share is close to Nez Perce County’s 1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Nez Perce County has 711.7 times the land area of nearby Sweetwater CDP (1.19 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Clearwater County, Idaho County, Latah County, Lewis County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

