Leesville is a city in and the parish seat of Vernon Parish, Louisiana, United States. The population was 6,753 at the 2000 census. It is part of the Fort Polk South Micropolitan Statistical Area. The city is home to the Fort Polk U.S. Army installation. The populations of Fort Polk and Leesville, if combined, would result in a city with a population of more than 20,000.
Leesville is located at 31°8′37″N 93°16′16″W / 31.14361°N 93.27111°W / 31.14361; -93.27111 (31.143553, -93.271196) and has an elevation of 254 feet (77.4 m).
According to the United States Census Bureau, the city has a total area of 5.49 square miles (14.2 km²), of which, 5.45 square miles (14.1 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.55%) is water.