Custer County is a rural mountain
county located in the center of the
U.S. state of
Idaho. As of the
2010 census, the population was 4,368. 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.