Dunlap, IL has a population of 1,351 and is the 13,315th largest city in the United States. The population density is 645 per sq mi which is 190% higher than the Illinois average and 612% higher than the national average. The median age in Dunlap is 34 which is approximately 8% lower than the Illinois average of 37. In Dunlap, 69% of the population over 15 years of age are married, 91% speak English and 1% speak Spanish. 70% of Dunlap residents were born in Illinois, 23% were born out of state, 0% were born outside of the United States and 7% were foreign born.