Boise County, Idaho

Boise County is a largely rural area just north of Idaho’s capital, Boise, known for its mountains, forests, and small communities scattered along the Payette River. Idaho City, the county seat, has a classic Old West appearance and grew during the Idaho Gold Rush. Today, it’s a quirky historic town and popular tourist stop.

The county is a haven for outdoor recreation, with world-class whitewater rafting on the Payette River and hiking trails winding through the Boise National Forest. Bogus Basin is also a popular nearby destination for skiing and winter recreation, adding to the area’s appeal throughout the year.

Summers bring campers, hikers, and hunters, while winters can be harsh enough to leave some remote communities nearly isolated. Boise County has a strong independent spirit, with residents valuing privacy, open space, and self-reliance. It’s a place where rugged wilderness and small-town living come together without feeling too far removed from Boise.

CategoryDetails
County NameBoise County
County SeatIdaho City
EtymologyNamed after the Boise River, which was named from the French word “boisé,” meaning “wooded.”
Cities, Towns, and CommunitiesIdaho City, Horseshoe Bend, Garden Valley, Placerville, and more
Interstates and HighwaysU.S. Route 55, Idaho State Highway 21
FIPS Code16-015
Total Area1,903 square miles (land: 1,900 sq mi; water: 3 sq mi)
Adjacent Counties Valley County (North), Custer County (East), Elmore County (South), Ada County (Southwest), Gem County (Northwest)
Time ZoneMountain Time Zone
StateIdaho
Coordinates44.0° N, 115.9° W
Major LandmarksBoise National Forest, Idaho City Historic District, Garden Valley, Sawtooth Wilderness
Population9,000
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