ZIP CodesZIP codes in Williamson County, Illinois
Williamson County, Illinois has 11 ZIP codes in this list, from 62841 to 62974. They cover 11 places, among them Freeman Spur, Cambria, Carterville and Colp.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 62841 | Freeman Spur | 0.3 | 37.861, -88.997 |
| 62915 | Cambria | 0.3 | 37.781, -89.119 |
| 62918 | Carterville | 37.5 | 37.775, -89.098 |
| 62921 | Colp | 0.5 | 37.805, -89.080 |
| 62922 | Creal Springs | 63.3 | 37.620, -88.837 |
| 62933 | Energy | 2.4 | 37.773, -89.025 |
| 62948 | Herrin | 20.0 | 37.802, -89.023 |
| 62949 | Hurst | 1.7 | 37.837, -89.142 |
| 62951 | Johnston City | 27.7 | 37.825, -88.921 |
| 62959 | Marion | 143 | 37.726, -88.929 |
| 62974 | Pittsburg | 25.9 | 37.805, -88.808 |
The ZIP code areas of Williamson County add up to about 323 square miles of land (836 sq km) as the Census Bureau draws them. The largest is 62959 (Marion), with 143 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Freeman Spur, IL 62841.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.