Marion County, Kentucky

Marion County
Marion County courthouse in Lebanon
Location within the U.S. state of Kentucky
Kentucky's location within the U.S.
Coordinates: 37°33′N 85°16′W / 37.55°N 85.27°W / 37.55; -85.27
Country United States
State Kentucky
Founded1834
Named afterFrancis Marion
SeatLebanon
Largest cityLebanon
Area
  Total
347 sq mi (900 km2)
  Land343 sq mi (890 km2)
  Water3.9 sq mi (10 km2)  1.1%
Population
 (2020)
  Total
19,581
  Estimate 
(2024)
19,851
  Density56/sq mi (22/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district1st
Websitewww.marioncounty.ky.gov

Marion County is a county in the U.S. state of Kentucky. As of the 2020 census, the total population was 19,581. Its county seat is Lebanon. The county was founded in 1834 and named for Francis Marion, the American Revolutionary War hero known as the "Swamp Fox".