County · Illinois · United States
Williamson County ZIP codes
11 ZIP codes · 11 cities · FIPS 17199
Key facts
- State
- Illinois (IL)
- FIPS code
- 17199
- Population
- 66,902
- Median household income
- $65,521
- Median age
- 41.4
- Land area
- 420.2 sq mi (1,088.3 km²)
- Population density
- 159 / sq mi
- Area codes
- 618, 730
Cities and ZIP codes in Williamson County (11)
| City | ZIP codes |
|---|---|
| Cambria | 62915 |
| Carterville | 62918 |
| Colp | 62921 |
| Creal Springs | 62922 |
| Energy | 62933 |
| Freeman Spur | 62841 |
| Herrin | 62948 |
| Hurst | 62949 |
| Johnston City | 62951 |
| Marion | 62959 |
| Pittsburg | 62974 |
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.