Leesburg is a town in Plain Township, Kosciusko County, Indiana, United States. The population was 555 at the 2010 census. The town of Leesburg was incorporated in 1833.
Leesburg is located at 41°19′50″N 85°51′1″W / 41.33056°N 85.85028°W / 41.33056; -85.85028 (41.330538, -85.850323).
According to the United States Census Bureau, the town has a total area of 0.2 square miles (0.6 km²), all land.