Tahlequah, OK has a population of 16,478 and is the 2,592nd largest city in the United States. The population density is 1,320 per sq mi which is 2319% higher than the Oklahoma average and 1357% higher than the national average. The median age in Tahlequah is 28 which is approximately 23% lower than the Oklahoma average of 36. In Tahlequah, 39% of the population over 15 years of age are married, 92% speak English and 4% speak Spanish. 65% of Tahlequah residents were born in Oklahoma, 31% were born out of state, 1% were born outside of the United States and 3% were foreign born.