Zip Code | City | Population |
|---|---|---|
| 61554 | Pekin | 40,775 |
| 61571 | Washington | 24,712 |
| 61611 | East Peoria | 23,447 |
| 61550 | Morton | 18,483 |
| 61610 | Creve Coeur | 4,695 |
| 61568 | Tremont | 4,606 |
| 61755 | Mackinaw | 4,530 |
| 61546 | Manito | 3,791 |
| 61734 | Delavan | 2,520 |
| 61535 | Groveland | 2,163 |
| 61534 | Green Valley | 2,057 |
| 61747 | Hopedale | 1,452 |
| 61759 | Minier | 1,350 |
| 61564 | South Pekin | 1,053 |
| 61733 | Deer Creek | 870 |
| 61721 | Armington | 573 |