Allen Parish (French: Paroisse d’Allen) is a parish located in the U.S. state of Louisiana. As of the 2010 census, the population was 25,764. The parish seat is Oberlin. Allen Parish is in southwestern Louisiana, southwest of Alexandria.
According to the U.S. Census Bureau, the parish has a total area of 766 square miles (1,980 km), of which 762 square miles (1,970 km) is land and 4.1 square miles (11 km) (0.5%) is water.
As of the census of 2000, there were 25,440 people, 8,102 households, and 5,930 families residing in the parish. The population density was 33 people per square mile (13/km²). There were 9,157 housing units at an average density of 12 per square mile (5/km²). The racial makeup of the parish was 71.90% White, 24.60% Black or African American, 1.72% Native American, 0.57% Asian, 0.01% Pacific Islander, 0.24% from other races, and 0.96% from two or more races. 4.50% of the population were Hispanic or Latino of any race. 6.22% reported speaking French or Cajun French at home, while 4.68% speak Spanish.
There were 8,102 households out of which 36.90% had children under the age of 18 living with them, 54.00% were married couples living together, 15.20% had a female householder with no husband present, and 26.80% were non-families. 24.30% of all households were made up of individuals and 11.10% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.12.
In the parish the population was spread out with 24.60% under the age of 18, 9.30% from 18 to 24, 33.40% from 25 to 44, 20.80% from 45 to 64, and 11.80% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 126.40 males. For every 100 females age 18 and over, there were 133.50 males.
The median income for a household in the parish was $27,777, and the median income for a family was $33,920. Males had a median income of $32,371 versus $17,154 for females. The per capita income for the parish was $13,101. About 17.90% of families and 19.90% of the population were below the poverty line, including 22.60% of those under age 18 and 21.50% of those age 65 or over.
The most populated city as of the 2000 census was Oakdale, LA.