Dunlap, IA has a population of 1,021 and is the 15,017th largest city in the United States. The population density is 904 per sq mi which is 1555% higher than the Iowa average and 898% higher than the national average. The median age in Dunlap is 51 which is approximately 34% higher than the Iowa average of 38. In Dunlap, 68% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 74% of Dunlap residents were born in Iowa, 25% were born out of state, 0% were born outside of the United States and 1% were foreign born.