Naplate, IL has a population of 441 and is the 20,339th largest city in the United States. The population density is 3,915 per sq mi which is 1661% higher than the Illinois average and 4221% higher than the national average. The median age in Naplate is 45 which is approximately 20% higher than the Illinois average of 37. In Naplate, 42% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 90% of Naplate residents were born in Illinois, 10% were born out of state, 0% were born outside of the United States and 0% were foreign born.