Williamson County, Illinois ZIP codes
12 ZIP codes are in Williamson County, plus 10 that cross in from neighboring counties. It's part of the Marion-Herrin, IL micro area.
- ZIP codes
- 12
- Population in these ZIPs
- 67,368
- Avg. median income
- $67,600population-weighted
- Cities & towns
- 12
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Williamson County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 62841 | Freeman Spur | 118 | $31,750 | $60,600 |
| 62902 | Carbondale | 4,135 | $84,223 | $195,200 |
| 62915 | Cambria | 384 | $31,875 | $106,700 |
| 62918 | Carterville | 10,658 | $70,920 | $198,300 |
| 62921 | Colp | 233 | — | $75,000 |
| 62922 | Creal Springs | 2,608 | $74,245 | $197,400 |
| 62933 | Energy | 1,101 | $67,794 | $167,600 |
| 62948 | Herrin | 12,758 | $60,975 | $113,600 |
| 62949 | Hurst | 702 | $37,308 | $74,500 |
| 62951 | Johnston City | 5,342 | $50,657 | $109,900 |
| 62959 | Marion | 27,793 | $71,063 | $183,400 |
| 62974 | Pittsburg | 1,536 | $64,107 | $148,000 |
ZIP codes partly in Williamson County
These ZIP codes are mostly in a neighboring county but cover part of Williamson County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 62890 | Thompsonville | Franklin County | 2,377 | $54,271 | $156,700 |
| 62896 | West Frankfort | Franklin County | 10,627 | $55,458 | $107,000 |
| 62901 | Carbondale | Jackson County | 22,946 | $35,089 | $128,900 |
| 62917 | Carrier Mills | Saline County | 2,303 | $50,119 | $81,900 |
| 62924 | De Soto | Jackson County | 3,168 | $70,357 | $115,700 |
| 62935 | Galatia | Saline County | 2,178 | $60,238 | $129,800 |
| 62939 | Goreville | Johnson County | 2,958 | $65,750 | $199,400 |
| 62958 | Makanda | Jackson County | 2,103 | $65,833 | $193,600 |
| 62967 | New Burnside | Johnson County | 309 | $62,404 | $116,700 |
| 62987 | Stonefort | Pope County | 1,724 | $83,393 | $160,200 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Williamson County
Nearby counties
Frequently asked questions
How many ZIP codes are in Williamson County, Illinois?
12 ZIP codes are mainly in Williamson County, and 10 more ZIP codes from neighboring areas reach partly into it.
What cities are in Williamson County?
ZIP codes in Williamson County use the city names Cambria, Carbondale, Carterville, Colp, Creal Springs, Energy, Freeman Spur, Herrin, Hurst, Johnston City, Marion and Pittsburg.
What metro area is Williamson County in?
Williamson County is part of the Marion-Herrin, IL micropolitan statistical area.