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) is land and 0.04 square miles (0.10 km2) (0.55%) is water.
As of the 2020 United States census, there were 5,649 people, 2,415 households, and 1,266 families residing in the city.
2000 census
As of the census[11] of 2000, there were 6,753 people, 2,841 households, and 1,650 families residing in the city. The population density was 1,238.7 inhabitants per square mile (478.3/km2). There were 3,389 housing units at an average density of 621.7 per square mile (240.0/km2). The racial makeup of the city was 55.49% White, 35.33% African American, 1.47% Native American, 2.09% Asian, 0.56% Pacific Islander, 2.25% from other races, and 2.81% from two or more races. Hispanic or Latino of any race were 4.92% of the population.
There were 2,841 households, out of which 29.0% had children under the age of 18 living with them, 36.2% were married couples living together, 18.3% had a female householder with no husband present, and 41.9% were non-families. Nearly 36.7% of all households were made up of individuals, and 11.4% had someone living alone who was 65 years of age or older. The average household size was 2.29 and the average family size was 3.02.
In the city, the population was spread out, with 26.1% under the age of 18, 11.0% from 18 to 24, 28.6% from 25 to 44, 20.5% from 45 to 64, and 13.9% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 96.0 males. For every 100 females age 18 and over, there were 91.4 males.
The median income for a household in the city was $23,864, and the median income for a family was $30,435. Males had a median income of $27,267 versus $21,661 for females. The per capita income for the city was $14,360. About 24.5% of families and 28.7% of the population were below the poverty line, including 42.0% of those under age 18 and 15.1% of those age 65 or over.
^"Station: Leesville, LA". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Retrieved August 27, 2021.