Mediapolis, IA has a population of 1,536 and is the 12,546th largest city in the United States. The population density is 1,275 per sq mi which is 2234% higher than the Iowa average and 1308% higher than the national average. The median age in Mediapolis is 38 which is approximately 1% lower than the Iowa average of 38. In Mediapolis, 67% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 78% of Mediapolis residents were born in Iowa, 21% were born out of state, 0% were born outside of the United States and 0% were foreign born.