Waverly, IA has a population of 10,049 and is the 3,930th largest city in the United States. The population density is 898 per sq mi which is 1543% higher than the Iowa average and 891% higher than the national average. The median age in Waverly is 34 which is approximately 11% lower than the Iowa average of 38. In Waverly, 55% of the population over 15 years of age are married, 96% speak English and 1% speak Spanish. 76% of Waverly residents were born in Iowa, 21% were born out of state, 1% were born outside of the United States and 2% were foreign born.