Manning, IA has a population of 1,509 and is the 12,646th largest city in the United States. The population density is 607 per sq mi which is 1011% higher than the Iowa average and 570% higher than the national average. The median age in Manning is 48 which is approximately 27% higher than the Iowa average of 38. In Manning, 66% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 80% of Manning residents were born in Iowa, 18% were born out of state, 0% were born outside of the United States and 2% were foreign born.