Hamilton County, Iowa

Hamilton County
Location within the U.S. state of Iowa
Iowa's location within the U.S.
Coordinates: 42°22′55″N 93°42′39″W / 42.381944444444°N 93.710833333333°W / 42.381944444444; -93.710833333333
Country United States
State Iowa
Founded1856
Named afterWilliam W. Hamilton
SeatWebster City
Largest cityWebster City
Area
  Total
578 sq mi (1,500 km2)
  Land577 sq mi (1,490 km2)
  Water0.8 sq mi (2 km2)  0.1%
Population
 (2020)
  Total
15,039
  Estimate 
(2023)
14,729
  Density26/sq mi (10/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district4th
Websitewww.hamiltoncounty.iowa.gov

Hamilton County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 15,039. The county seat is Webster City. The county was named to honor William W. Hamilton, a President of the Iowa State Senate.