Freeport, IL has a population of 24,784 and is the 1,755th largest city in the United States. The population density is 2,107 per sq mi which is 848% higher than the Illinois average and 2225% higher than the national average. The median age in Freeport is 43 which is approximately 14% higher than the Illinois average of 37. In Freeport, 54% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 73% of Freeport residents were born in Illinois, 24% were born out of state, 1% were born outside of the United States and 2% were foreign born.