Calhoun County, Iowa

Calhoun County, Iowa
Calhoun County Courthouse in Rockwell City
The historic Central School in Lake City
A grain elevator in the small town of Somers rises from a field at sunset
Location within the U.S. state of Iowa
Coordinates: 42°23′10″N 94°38′37″W / 42.386061°N 94.643602°W / 42.386061; -94.643602
Country United States
State Iowa
FoundedJanuary 15, 1851 (created)
November 7, 1855 (organized)
Named afterJohn C. Calhoun
SeatRockwell City
Largest cityRockwell City
Area
 • Total
572.114 sq mi (1,481.77 km2)
 • Land569.846 sq mi (1,475.89 km2)
 • Water2.268 sq mi (5.87 km2)  0.4%
Population
 (2020)
 • Total
9,927
 • Estimate 
(2024)
9,711
 • Density17.42/sq mi (6.726/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Area code712
Congressional district4th
Websitecalhouncounty.iowa.gov
  • Iowa county number 13

Calhoun County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 9,927, and was estimated to be 9,711 in 2024. The county seat and largest city is Rockwell City.