Catahoula Parish (French: Paroisse de Catahoula) is a parish in the U.S. state of Louisiana. As of the 2010 census, the population was 10,407. Its seat is Harrisonburg, on the Ouachita River. The parish was formed in 1808, shortly after the United States acquired this territory in the Louisiana Purchase of 1803.
According to the U.S. Census Bureau, the parish has a total area of 739 square miles (1,910 km), of which 708 square miles (1,830 km) is land and 31 square miles (80 km) (4.2%) is water. It is home to Sandy Lake.
As of the census of 2000, there were 10,920 people, 4,082 households, and 2,992 families residing in the parish. The population density was 16 people per square mile (6/km²). There were 5,351 housing units at an average density of 8 per square mile (3/km²). The racial makeup of the parish was 71.78% White, 27.12% Black or African American, 0.19% Native American, 0.13% Asian, 0.19% from other races, and 0.59% from two or more races. 0.92% of the population were Hispanic or Latino of any race.
There were 4,082 households out of which 32.70% had children under the age of 18 living with them, 54.70% were married couples living together, 14.50% had a female householder with no husband present, and 26.70% were non-families. 24.30% of all households were made up of individuals and 11.30% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.02.
In the parish the population was spread out with 25.80% under the age of 18, 10.00% from 18 to 24, 26.80% from 25 to 44, 23.00% from 45 to 64, and 14.40% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 100.60 males. For every 100 females age 18 and over, there were 98.00 males.
The median income for a household in the parish was $22,528, and the median income for a family was $27,206. Males had a median income of $26,181 versus $18,427 for females. The per capita income for the parish was $12,608. About 22.60% of families and 28.10% of the population were below the poverty line, including 41.80% of those under age 18 and 20.10% of those age 65 or over.