Annapolis, IL has a population of 46 and is the 28,248th largest city in the United States. The population density is 1,487 per sq mi which is 569% higher than the Illinois average and 1541% higher than the national average. The median age in Annapolis is 31 which is approximately 18% lower than the Illinois average of 37. In Annapolis, 74% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 67% of Annapolis residents were born in Illinois, 33% were born out of state, 0% were born outside of the United States and 0% were foreign born.