Boone County, Illinois
5 ZIP codes · 280.75 sq mi of land · FIPS 17007
| Population | 53,230 |
|---|---|
| State | Illinois |
| FIPS code | 17007 |
| Time zone | Central |
| Land area | 280.75 sq mi |
| Center (lat, long) | 42.3190, -88.8243 |
Area codes in this area
These are the area codes that most often serve Boone County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Cities and towns (largest first)
ZIP codes in Boone County
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.