Tenkiller, OK has a population of 571 and is the 18,745th largest city in the United States. The population density is 30 per sq mi which is 45% lower than the Oklahoma average and 67% lower than the national average. The median age in Tenkiller is 37 which is approximately 3% higher than the Oklahoma average of 36. In Tenkiller, 47% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 80% of Tenkiller residents were born in Oklahoma, 20% were born out of state, 0% were born outside of the United States and 0% were foreign born.