Mustang, OK has a population of 19,637 and is the 2,219th largest city in the United States. The population density is 1,638 per sq mi which is 2902% higher than the Oklahoma average and 1708% higher than the national average. The median age in Mustang is 37 which is approximately 3% higher than the Oklahoma average of 36. In Mustang, 62% of the population over 15 years of age are married, 94% speak English and 5% speak Spanish. 65% of Mustang residents were born in Oklahoma, 31% were born out of state, 1% were born outside of the United States and 3% were foreign born.