Prairie City, IA has a population of 1,973 and is the 11,096th largest city in the United States. The population density is 1,592 per sq mi which is 2814% higher than the Iowa average and 1657% higher than the national average. The median age in Prairie City is 38 which is approximately 1% lower than the Iowa average of 38. In Prairie City, 64% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 84% of Prairie City residents were born in Iowa, 15% were born out of state, 0% were born outside of the United States and 1% were foreign born.