16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 62521 | Decatur | 32,455 |
| 62526 | Decatur | 31,191 |
| 62522 | Decatur | 14,984 |
| 62549 | Mt Zion | 6,789 |
| 62535 | Forsyth | 3,656 |
| 61756 | Maroa | 2,625 |
| 62501 | Argenta | 2,113 |
| 62554 | Oreana | 1,738 |
| 62544 | Macon | 1,719 |
| 62573 | Warrensburg | 1,154 |
| 61925 | Dalton City | 1,037 |
| 62551 | Niantic | 908 |
| 62523 | Decatur | 802 |
| 62514 | Boody | 372 |
| 62537 | Harristown | 288 |
| 62532 | Elwin | 33 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Macon County, Illinois (US Census).