Founded in 1829, Macon County is one of 102 counties in the state of Illinois. Historically, Macon County was formed from Shelby County. The city of Decatur is the county seat. With FIPS code of 115, Macon County has a population of 102,432 and area of 580 square miles (1,502 km2).
List of all cities in Macon County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Argenta, IL | 62501 | 217 |
| Bearsdale, IL | 62526 | 217 |
| Blue Mound, IL | 62513 | 217 |
| Boody, IL | 62514 | 217 |
| Decatur, IL | 62521 | 217 |
| 62522 | 217 | |
| 62523 | 217 | |
| 62524 | 217 | |
| 62525 | 217 | |
| 62526 | 217 | |
| Elwin, IL | 62532 | 217 |
| Forsyth, IL | 62535 | 217 |
| Harristown, IL | 62537 | 217 |
| Heman, IL | 62573 | 217 |
| Hervey City, IL | 62549 | 217 |
| Macon, IL | 62544 | 217 |
| Maroa, IL | 61756 | 217 |
| Mount Zion, IL | 62549 | 217 |
| Newburg, IL | 62501 | 217 |
| Niantic, IL | 62551 | 217 |
| Oakley, IL | 62501 | 217 |
| Oreana, IL | 62554 | 217 |
| Warrensburg, IL | 62573 | 217 |