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".

Lebanon is a home rule-class city and the county seat of Marion County, Kentucky, in the United States. The population was 6,274 at the 2020 census, up from 5,539 in 2010. Lebanon is located in central Kentucky, 63 miles (101 km) southeast of Louisville. A national cemetery is nearby.