Leesburg is a city in Lake County, Florida, United States. The population was 20,117 at the 2010 census. As of 2019, the population recorded by the U.S. Census Bureau was 23,671. Leesburg is in central Florida, between Lake Harris and Lake Griffin, at the head of the Ocklawaha River. It is part of the Orlando–Kissimmee–Sanford Metropolitan Statistical Area. Lake–Sumter State College and Beacon College are located in Leesburg.