Cresco, IA has a population of 3,839 and is the 7,631st largest city in the United States. The population density is 1,147 per sq mi which is 1999% higher than the Iowa average and 1166% higher than the national average. The median age in Cresco is 41 which is approximately 8% higher than the Iowa average of 38. In Cresco, 64% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 78% of Cresco residents were born in Iowa, 22% were born out of state, 0% were born outside of the United States and 0% were foreign born.