Chattanooga, OK has a population of 422 and is the 20,520th largest city in the United States. The population density is 743 per sq mi which is 1258% higher than the Oklahoma average and 720% higher than the national average. The median age in Chattanooga is 34 which is approximately 6% lower than the Oklahoma average of 36. In Chattanooga, 56% of the population over 15 years of age are married, 97% speak English and 3% speak Spanish. 71% of Chattanooga residents were born in Oklahoma, 26% were born out of state, 2% were born outside of the United States and 1% were foreign born.