Decatur County, Iowa

Decatur County
Location within the U.S. state of Iowa
Iowa's location within the U.S.
Coordinates: 40°44′29″N 93°46′51″W / 40.741388888889°N 93.780833333333°W / 40.741388888889; -93.780833333333
Country United States
State Iowa
Founded1846
Named afterStephen Decatur Jr.
SeatLeon
Largest cityLamoni
Area
  Total
533 sq mi (1,380 km2)
  Land532 sq mi (1,380 km2)
  Water1.6 sq mi (4 km2)  0.3%
Population
 (2020)
  Total
7,645
  Estimate 
(2024)
7,656
  Density14.4/sq mi (5.6/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district3rd
Websitewww.decaturcountyiowa.org

Decatur County (/dɪˈktər/) is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 7,645. The county seat is Leon. This county is named for Stephen Decatur Jr., a hero in the War of 1812.