Dyersville, IA has a population of 4,180 and is the 7,249th largest city in the United States. The population density is 619 per sq mi which is 1033% higher than the Iowa average and 583% higher than the national average. The median age in Dyersville is 40 which is approximately 5% higher than the Iowa average of 38. In Dyersville, 69% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 89% of Dyersville residents were born in Iowa, 9% were born out of state, 0% were born outside of the United States and 1% were foreign born.