Union City, OK has a population of 1,469 and is the 12,814th largest city in the United States. The population density is 26 per sq mi which is 52% lower than the Oklahoma average and 71% lower than the national average. The median age in Union City is 45 which is approximately 25% higher than the Oklahoma average of 36. In Union City, 59% of the population over 15 years of age are married, 95% speak English and 3% speak Spanish. 64% of Union City residents were born in Oklahoma, 33% were born out of state, 0% were born outside of the United States and 2% were foreign born.