Valley County, Idaho

Valley County
Bighorn Ram, Recycled Barbed Wire Sculpture in Cascade, Idaho
Location within the U.S. state of Idaho
Idaho's location within the U.S.
Coordinates: 44°44′N 115°34′W / 44.74°N 115.56°W / 44.74; -115.56
Country United States
State Idaho
FoundedFebruary 26, 1917
Named afterThe Long Valley of the North Fork of the Payette River
SeatCascade
Largest cityMcCall
Area
  Total
3,733 sq mi (9,670 km2)
  Land3,665 sq mi (9,490 km2)
  Water68 sq mi (180 km2)  1.8%
Population
 (2020)
  Total
11,746
  Density3.1/sq mi (1.2/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district1st
Websiteco.valley.id.us

Valley County is a rural county located in the U.S. state of Idaho. As of the 2020 census, the population was 11,746. The county seat is Cascade, and the largest city is McCall. Established in 1917, it was named after the Long Valley of the North Fork of the Payette River, which extends over 30 miles (50 km) from Payette Lake at McCall south to Cascade to Round Valley. The valley was formerly a summer pasture for livestock from the Boise Valley. Since the completion of the Cascade Dam in 1948, much of the northern valley has been covered by the Cascade Reservoir.

Valley County is home to the Idaho ground squirrel.