Calhoun County, Iowa

Calhoun County
Clockwise from top: Calhoun County Courthouse in Rockwell City, the former Lake City Public Library, a grain elevator in the small town of Somers rises from a field at sunset, and the historic Central School in Lake City
Location within the U.S. state of Iowa
Iowa's location within the U.S.
Coordinates: 42°23′10″N 94°38′50″W / 42.386111111111°N 94.647222222222°W / 42.386111111111; -94.647222222222
Country United States
State Iowa
Founded1855
Named afterJohn C. Calhoun
SeatRockwell City
Largest cityRockwell City
Area
  Total
572 sq mi (1,480 km2)
  Land570 sq mi (1,500 km2)
  Water2.1 sq mi (5 km2)  0.4%
Population
 (2020)
  Total
9,927
  Estimate 
(2023)
9,763
  Density17/sq mi (6.7/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district4th
Websitewww.calhouncounty.iowa.gov

Calhoun County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 9,927. Its county seat is Rockwell City.