Marksville is a small city in and the parish seat of Avoyelles Parish, Louisiana, United States. The population was 5,702 at the 2010 census, an increase of 165 over the 2000 tabulation of 5,537.
Marksville is located at 31°7′36″N 92°3′58″W / 31.12667°N 92.06611°W / 31.12667; -92.06611 (31.126595, −92.066073).
According to the United States Census Bureau, the city has a total area of 4.1 square miles (11 km), of which 4.1 square miles (11 km) is land and 0.24% is water.
As of the census of 2000, there were 5,537 people, 2,036 households, and 1,400 families residing in the city. The population density was 1,358.0 inhabitants per square mile (524.3/km). There were 2,198 housing units at an average density of 539.1 per square mile (208.1/km). The racial makeup of the city was 51.98% White, 48.59% African American, 0.80% Native American, 0.27% Asian, 0.11% from other races, and 1.25% from two or more races. Hispanic or Latino of any race were 0.65% of the population.
There were 2,036 households out of which 36.3% had children under the age of 18 living with them, 41.0% were married couples living together, 22.4% had a female householder with no husband present, and 31.2% were non-families. 27.8% of all households were made up of individuals and 13.8% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.15.
In the city, the population was spread out with 28.7% under the age of 18, 9.6% from 18 to 24, 27.2% from 25 to 44, 20.2% from 45 to 64, and 14.3% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 79.9 males. For every 100 females age 18 and over, there were 72.0 males.
The median income for a household in the city was $20,750, and the median income for a family was $25,681. Males had a median income of $24,896 versus $15,865 for females. The per capita income for the city was $11,546. About 32.0% of families and 34.8% of the population were below the poverty line, including 50.1% of those under age 18 and 25.4% of those age 65 or over.