Cities and Towns in Marion County, Illinois
Founded in 1823, Marion County is one of 102 counties in the state of Illinois. Historically, Marion County was formed from Fayette and Jefferson County. The city of Salem is the county seat. With FIPS code of 121, Marion County has a population of 37,390 and area of 572 square miles (1,481 km²).
List of all cities in Marion County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Alma, IL | 62807 | 618/730 |
| Carrigan, IL | 62875 | 618/730 |
| Cartter, IL | 62853 | 618/730 |
| Central City, IL | 62801 | 618/730 |
| Centralia, IL | 62801 | 618/730 |
| Cravat, IL | 62801 | 618/730 |
| Fairman, IL | 62882 | 618/730 |
| Finney Heights, IL | 62801 | 618/730 |
| Glen Ridge, IL | 62882 | 618/730 |
| Haines, IL | 62853 | 618/730 |
| Helm, IL | 62849 | 618/730 |
| Iuka, IL | 62849 | 618/730 |
| Junction City, IL | 62882 | 618/730 |
| Kell, IL | 62853 | 618/730 |
| Kinmundy, IL | 62854 | 618/730 |
| Odin, IL | 62870 | 618/730 |
| Omega, IL | 62849 | 618/730 |
| Patoka, IL | 62875 | 618/730 |
| Pope, IL | 62875 | 618/730 |
| Raccoon, IL | 62801 | 618/730 |
| Salem, IL | 62881 | 618/730 |
| Sandoval, IL | 62882 | 618/730 |
| Slap Out, IL | 62849 | 618/730 |
| Suburban Heights, IL | 62801 | 618/730 |
| Vernon, IL | 62892 | 618/730 |
| Walnut Hill, IL | 62893 | 618/730 |
| Wamac, IL | 62801 | 618/730 |
