Marion County, Iowa

Marion County, Iowa
The Marion County Courthouse in Knoxville
Location within the U.S. state of Iowa
Coordinates: 41°19′52″N 93°06′08″W / 41.331111111111°N 93.102222222222°W / 41.331111111111; -93.102222222222
Country United States
State Iowa
Founded1845
Named afterFrancis Marion
SeatKnoxville
Largest cityPella
Area
 • Total
571 sq mi (1,480 km2)
 • Land555 sq mi (1,440 km2)
 • Water16 sq mi (41 km2)  2.8%
Population
 (2020)
 • Total
33,414
 • Estimate 
(2024)
34,048
 • Density60.2/sq mi (23.2/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district1st
Websitewww.marioncountyiowa.gov
  • Iowa county number 63

Marion County is a county in the U.S. state of Iowa. As of the 2020 census, the population was 33,414. The county seat is Knoxville. It is named for Francis Marion, a brigadier general from South Carolina in the American Revolutionary War.