Williamson County, Illinois
12 ZIP codes · 420.21 sq mi of land · FIPS 17199
| Population | 66,876 |
|---|---|
| State | Illinois |
| FIPS code | 17199 |
| Time zone | Central |
| Land area | 420.21 sq mi |
| Center (lat, long) | 37.7304, -88.9300 |
Area codes in this area
These are the area codes that most often serve Williamson 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)
Carbondale · 22,158Marion · 16,836Freeman SpurCambriaCartervilleColpCreal SpringsEnergyHerrinHurstJohnston CityPittsburg
ZIP codes in Williamson County
62841 Freeman Spur62902 Carbondale62915 Cambria62918 Carterville62921 Colp62922 Creal Springs62933 Energy62948 Herrin62949 Hurst62951 Johnston City62959 Marion62974 Pittsburg
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.