Readlyn, IA has a population of 843 and is the 16,247th largest city in the United States. The population density is 2,568 per sq mi which is 4601% higher than the Iowa average and 2734% higher than the national average. The median age in Readlyn is 34 which is approximately 10% lower than the Iowa average of 38. In Readlyn, 73% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 90% of Readlyn residents were born in Iowa, 8% were born out of state, 1% were born outside of the United States and 1% were foreign born.