Lost River, Idaho

Lost River, Idaho
Location in Custer County and the state of Idaho
Coordinates: 43°43′18″N 113°32′42″W / 43.72167°N 113.54500°W / 43.72167; -113.54500
CountryUnited States
StateIdaho
CountyCuster
Area
  Total
8.70 sq mi (22.53 km2)
  Land8.69 sq mi (22.51 km2)
  Water0.01 sq mi (0.03 km2)
Elevation
6,368 ft (1,941 m)
Population
 (2020)
  Total
42
  Density7.8/sq mi (3.0/km2)
Time zoneUTC-7 (Mountain (MST))
  Summer (DST)UTC-6 (MDT)
Area code208
FIPS code16-47890
GNIS feature ID2410881

Lost River is a city in Custer County, Idaho, United States. The population was 42 persons at the 2020 census.