Custer County, Idaho

Custer County
Mill used to process gold and silver ore at Yankee Fork mining operations.
Location within the U.S. state of Idaho
Idaho's location within the U.S.
Coordinates: 44°14′N 114°17′W / 44.23°N 114.29°W / 44.23; -114.29
Country United States
State Idaho
FoundedJanuary 8, 1881
Named afterGeneral Custer gold mine
SeatChallis
Largest cityChallis
Area
  Total
4,937 sq mi (12,790 km2)
  Land4,921 sq mi (12,750 km2)
  Water16 sq mi (40 km2)  0.3%
Population
 (2020)
  Total
4,275
  Density0.88/sq mi (0.34/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district2nd
Websitecustercountyidaho.org

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.