Custer County

Also known as Custer County, Idaho, Custer County, ID

county in central Idaho, United States

Key facts

Country: United States
State: Idaho
Founded: January 8, 1881
Named after: General Custer gold mine
Seat: Challis
Largest city: Challis
Total: 4,937 sq mi (12,790 km )
Land: 4,921 sq mi (12,750 km )
Water: 16 sq mi (41 km ) 0.3%
Estimate 2025: 4,636
Density: 0.88/sq mi (0.34/km )
Time zone: UTC−7 ( Mountain )
Summer dst: UTC−6 ( MDT )

Article

Leatherman Peak, 12,228 feet (3,727 m), second highest in Idaho, in the Lost River Range in eastern Custer County

Custer County is a rural mountain county in the center of the U.S. state of Idaho. As of the 2020 census, the population was 4,275, making it the fifth-least populous county in Idaho. The county seat is Challis. Established in 1881, the county was named for the General Custer Mine, where gold was discovered five years earlier. Custer County relies on ranching, mining, and tourism as its main resources.