Columbus, OH has a population of 837,038 and is the 15th largest city in the United States. The population density is 3,829 per sq mi which is 1387% higher than the Ohio average and 4126% higher than the national average. The median age in Columbus is 32 which is approximately 18% lower than the Ohio average of 39. In Columbus, 42% of the population over 15 years of age are married, 85% speak English and 4% speak Spanish. 66% of Columbus residents were born in Ohio, 22% were born out of state, 1% were born outside of the United States and 12% were foreign born.