Founded in 1812, Madison County is one of 102 counties in the state of Illinois. Historically, Madison County was formed from St. Clair County and Randolph County. The city of Edwardsville is the county seat. With FIPS code of 119, Madison County has a population of 264,490 and area of 716 square miles (1,854 km2).
List of all cities in Madison County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Alhambra, IL | 62001 | 618/730 |
| Alton, IL | 62002 | 618/730 |
| Bethalto, IL | 62010 | 618/730 |
| Cloverleaf, IL | 62060 | 618/730 |
| Collinsville, IL | 62234 | 618/730 |
| Cottage Hills, IL | 62018 | 618/730 |
| Dorsey, IL | 62021 | 618/730 |
| Dunlap Lake, IL | 62025 | 618/730 |
| Eagle Park, IL | 62060 | 618/730 |
| East Alton, IL | 62024 | 618/730 |
| Edwardsville, IL | 62025 | 618/730 |
| 62026 | 618/730 | |
| Fort Russell, IL | 62010 | 618/730 |
| Glen Carbon, IL | 62034 | 618/730 |
| Godfrey, IL | 62035 | 618/730 |
| Granite City, IL | 62040 | 618/730 |
| Grantfork, IL | 62249 | 618/730 |
| Hamel, IL | 62046 | 618/730 |
| Hartford, IL | 62048 | 618/730 |
| Highland, IL | 62249 | 618/730 |
| Holiday Shores, IL | 62025 | 618/730 |
| Kaufman, IL | 62001 | 618/730 |
| Livingston, IL | 62058 | 618/730 |
| Lumaghi Heights, IL | 62234 | 618/730 |
| Madison, IL | 62060 | 618/730 |
| Marine, IL | 62061 | 618/730 |
| Maryville, IL | 62062 | 618/730 |
| Mitchell, IL | 62040 | 618/730 |
| Moro, IL | 62067 | 618/730 |
| New Douglas, IL | 62074 | 217 |
| Newport, IL | 62060 | 618/730 |
| Pontoon Beach, IL | 62040 | 618/730 |
| Prairietown, IL | 62097 | 618/730 |
| Rosewood, IL | 62024 | 618/730 |
| Roxana, IL | 62084 | 618/730 |
| Saint Jacob, IL | 62281 | 618/730 |
| South Roxana, IL | 62087 | 618/730 |
| Southern Illinois University, IL | 62026 | 618/730 |
| State Park Place, IL | 62234 | 618/730 |
| Troy, IL | 62294 | 618/730 |
| Venice, IL | 62090 | 618/730 |
| Wood River, IL | 62095 | 618/730 |
| Worden, IL | 62097 | 618/730 |