Scott AFB, IL has a population of 2,982 and is the 8,853rd largest city in the United States. The population density is 691 per sq mi which is 211% higher than the Illinois average and 662% higher than the national average. The median age in Scott AFB is 24 which is approximately 37% lower than the Illinois average of 37. In Scott AFB, 77% of the population over 15 years of age are married, 92% speak English and 4% speak Spanish. 31% of Scott AFB residents were born in Illinois, 65% were born out of state, 2% were born outside of the United States and 2% were foreign born.