28 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 62040 | Granite City | 40,365 |
| 62025 | Edwardsville | 36,156 |
| 62234 | Collinsville | 31,832 |
| 62002 | Alton | 30,036 |
| 62249 | Highland | 16,550 |
| 62035 | Godfrey | 15,915 |
| 62294 | Troy | 15,246 |
| 62034 | Glen Carbon | 14,519 |
| 62010 | Bethalto | 11,154 |
| 62095 | Wood River | 10,780 |
| 62024 | East Alton | 9,465 |
| 62062 | Maryville | 8,521 |
| 62060 | Madison | 3,619 |
| 62281 | Saint Jacob | 3,018 |
| 62018 | Cottage Hills | 3,006 |
| 62097 | Worden | 2,627 |
| 62087 | South Roxana | 2,180 |
| 62067 | Moro | 1,960 |
| 62001 | Alhambra | 1,814 |
| 62084 | Roxana | 1,660 |
| 62061 | Marine | 1,528 |
| 62048 | Hartford | 1,456 |
| 62074 | New Douglas | 1,236 |
| 62021 | Dorsey | 1,127 |
| 62090 | Venice | 1,015 |
| 62026 | Edwardsville | 982 |
| 62046 | Hamel | 974 |
| 62058 | Livingston | 791 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 28 ZCTAs in Madison County, Illinois (US Census).