| Postal Service | Aledo |
| Division | Mercer |
| Post code | 61231 |
| Postal Service | Sherrard |
| Division | Mercer |
| Post code | 61281 |
| Postal Service | Viola |
| Division | Mercer |
| Post code | 61486 |
| Postal Service | Alexis |
| Division | Mercer |
| Post code | 61412 |
| Postal Service | New Boston |
| Division | Mercer |
| Post code | 61272 |
| Postal Service | New Windsor |
| Division | Mercer |
| Post code | 61465 |
| Postal Service | Joy |
| Division | Mercer |
| Post code | 61260 |
| Postal Service | Matherville |
| Division | Mercer |
| Post code | 61263 |
| Postal Service | Keithsburg |
| Division | Mercer |
| Post code | 61442 |
| Postal Service | Seaton |
| Division | Mercer |
| Post code | 61476 |
12 City in Mercer | List of Zip Codes Location In Illinois and Your selected County Mercer