28 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 62040 | Granite City | 40,404 |
| 62025 | Edwardsville | 35,520 |
| 62234 | Collinsville | 31,648 |
| 62002 | Alton | 29,543 |
| 62249 | Highland | 16,205 |
| 62035 | Godfrey | 15,892 |
| 62294 | Troy | 15,325 |
| 62034 | Glen Carbon | 14,870 |
| 62010 | Bethalto | 11,028 |
| 62095 | Wood River | 10,726 |
| 62024 | East Alton | 9,493 |
| 62062 | Maryville | 8,277 |
| 62060 | Madison | 3,558 |
| 62018 | Cottage Hills | 3,184 |
| 62281 | Saint Jacob | 3,059 |
| 62097 | Worden | 2,973 |
| 62067 | Moro | 2,203 |
| 62087 | South Roxana | 2,181 |
| 62001 | Alhambra | 1,869 |
| 62084 | Roxana | 1,631 |
| 62061 | Marine | 1,487 |
| 62048 | Hartford | 1,347 |
| 62074 | New Douglas | 1,205 |
| 62046 | Hamel | 1,102 |
| 62090 | Venice | 1,039 |
| 62058 | Livingston | 884 |
| 62021 | Dorsey | 871 |
| 62026 | Edwardsville | 851 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 28 ZCTAs in Madison County, Illinois (US Census).