Ada, OK has a population of 17,240 and is the 2,493rd largest city in the United States. The population density is 873 per sq mi which is 1405% higher than the Oklahoma average and 863% higher than the national average. The median age in Ada is 31 which is approximately 13% lower than the Oklahoma average of 36. In Ada, 46% of the population over 15 years of age are married, 93% speak English and 4% speak Spanish. 68% of Ada residents were born in Oklahoma, 28% were born out of state, 0% were born outside of the United States and 4% were foreign born.