Johnson County, Illinois
7 ZIP codes · 343.74 sq mi of land · FIPS 17087
| Population | 13,376 |
|---|---|
| State | Illinois |
| FIPS code | 17087 |
| Time zone | Central |
| Land area | 343.74 sq mi |
| Center (lat, long) | 37.4607, -88.8821 |
Area codes in this area
These are the area codes that most often serve Johnson 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)
BuncombeCypressGorevilleGrantsburgNew BurnsideOzarkVienna
ZIP codes in Johnson County
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.