If you are curious about the population and steets of Scott Afb City, you've come to the right place. Here you'll discover all you need to know. The population of Scott Afb City is based on the ZIP code that is assigned to your house. The first digit of the ZIP code is the national area code, which ranges from zero in the Northeast to nine in the far West. The next three or four digits are a facility code for a sectional center. Finally, the last two digits designate smaller post offices or postal zones.