Atoka is a city in, and the county seat of, Atoka County, Oklahoma, United States. The population was 3,107 at the 2010 census, an increase of 4.0 percent from 2,988 at the 2000 census. The city was settled by the Choctaw and named in 1867 by a Baptist missionary for Chief Atoka, whose name means "ball ground" in English.
Atoka is located at 34°23′3″N 96°7′39″W (34.384206, -96.127577). According to the United States Census Bureau, the city has a total area of 8.5 square miles (22.1 km2), of which 8.3 square miles (21.6 km2) is land and 0.15 square miles (0.4 km2), or 2.00%, is water.
As of the census of 2010, there were 3,107 people residing in the city. The population density was 354.7 people per square mile (137.0/km²). There were 1,499 housing units at an average density of 178.0 per square mile (68.7/km²). The racial makeup of the city was 72.86% White, 11.51% African American, 10.27% Native American, 0.27% Asian, 0.10% from other races, and 4.99% from two or more races. Hispanic or Latino of any race were 0.90% of the population.
There were 1,277 households out of which 26.4% had children under the age of 18 living with them, 38.9% were married couples living together, 15.0% had a female householder with no husband present, and 42.4% were non-families. 39.2% of all households were made up of individuals and 21.3% had someone living alone who was 65 years of age or older. The average household size was 2.22 and the average family size was 2.99.
In the city the population was spread out with 24.5% under the age of 18, 8.6% from 18 to 24, 22.4% from 25 to 44, 22.5% from 45 to 64, and 22.1% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 78.6 males. For every 100 females age 18 and over, there were 74.2 males.
The median income for a household in the city was $18,361, and the median income for a family was $22,344. Males had a median income of $25,431 versus $19,495 for females. The per capita income for the city was $12,017. About 19.1% of families and 25.3% of the population were below the poverty line, including 34.9% of those under age 18 and 17.8% of those age 65 or over.