Des Moines, IA has a population of 212,859 and is the 103rd largest city in the United States. The population density is 2,407 per sq mi which is 4306% higher than the Iowa average and 2557% higher than the national average. The median age in Des Moines is 34 which is approximately 11% lower than the Iowa average of 38. In Des Moines, 49% of the population over 15 years of age are married, 83% speak English and 9% speak Spanish. 66% of Des Moines residents were born in Iowa, 21% were born out of state, 1% were born outside of the United States and 12% were foreign born.