Westville is a town in Adair County, Oklahoma, United States. The population was 1,639 at the 2010 census, an increase of 2.7 percent from 1,596 at the 2000 census.
Westville is located at 35°59′29″N 94°34′16″W / 35.99139°N 94.57111°W / 35.99139; -94.57111 (35.991414, -94.571088). It is 13 miles (21 km) north of Stilwell and 15 miles (24 km) south of Siloam Springs, Arkansas.
According to the United States Census Bureau, the town has a total area of 1.2 square miles (3.1 km), all of it land.
Westville is located at the intersection of U.S. Routes 59 and 62.
As of the census of 2000, there were 1,596 people, 599 households, and 401 families residing in the town. The population density was 1,324.1 people per square mile (509.3/km²). There were 719 housing units at an average density of 596.5 per square mile (229.4/km²). The racial makeup of the town was 62.41% White, 0.25% African American, 28.07% Native American, 0.31% Asian, 2.63% from other races, and 6.33% from two or more races. Hispanic or Latino of any race were 6.02% of the population.
There were 599 households out of which 36.1% had children under the age of 18 living with them, 45.9% were married couples living together, 17.5% had a female householder with no husband present, and 32.9% were non-families. 28.7% of all households were made up of individuals and 12.0% 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 3.16.
In the town, the population was spread out with 29.9% under the age of 18, 8.3% from 18 to 24, 25.8% from 25 to 44, 20.3% from 45 to 64, and 15.7% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 87.1 males. For every 100 females age 18 and over, there were 82.4 males.
The median income for a household in the town was $22,381, and the median income for a family was $28,882. Males had a median income of $25,729 versus $20,438 for females. The per capita income for the town was $11,055. About 16.1% of families and 22.3% of the population were below the poverty line, including 24.0% of those under age 18 and 19.0% of those age 65 or over.