Decatur County, Iowa

Decatur County, Iowa
Location within the U.S. state of Iowa
Coordinates: 40°44′29″N 93°46′51″W / 40.741388888889°N 93.780833333333°W / 40.741388888889; -93.780833333333
Country United States
State Iowa
FoundedJanuary 13, 1846 (created)
May 6, 1850 (organized)
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 (4.1 km2)  0.3%
Population
 (2020)
 • Total
7,645
 • Estimate 
(2024)
7,656
 • Density14.4/sq mi (5.55/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district3rd
Websitewww.decaturcountyiowa.org
  • Iowa county number 27

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.