Idaho County

Idaho County is a large administrative region in central Idaho defined by mountains, forests, and rivers that shape its landscape. The area spans 8,485 square miles, making it the largest county by land area in the state.

The county gained its official status in 1864 during the Idaho Territory period, well before Idaho became a state in 1890. This early establishment reflects the region's importance during the settlement era.

The Nez Perce people have maintained a deep relationship with this land for generations, and that connection shapes how communities here live and interact today. You can sense this influence in local stories and in the respect for nature that appears throughout daily life.

The county seat in Grangeville serves as the main hub for administrative services and regional information. Visitors can stop there to get oriented and learn more about the area before exploring the natural attractions.

Large sections of the Nez Perce National Forest and the Salmon River are located within this county, offering hiking, fishing, and wildlife watching. These natural features draw people who want to spend time in the wilderness and experience the landscape firsthand.

Location: Idaho

Inception: February 4, 1864

Capital city: Grangeville

Elevation above the sea: 2,877 m

Shares border with: Clearwater County, Valley County, Missoula County, Ravalli County, Lemhi County, Adams County, Wallowa County, Nez Perce County, Lewis County

Website: http://idahocounty.org

GPS coordinates: 45.85000,-115.46000

Latest update: December 7, 2025 10:02