| Locality | Post Code |
|---|---|
| Albers, Clinton | 62215 |
| Aviston, Clinton | 62216 |
| Bartelso, Clinton | 62218 |
| Beckemeyer, Clinton | 62219 |
| Boulder, Clinton | 62231 |
| Breese, Clinton | 62230 |
| Carlyle, Clinton | 62231 |
| Clement, Clinton | 62252 |
| Damiansville, Clinton | 62215 |
| Ferrin, Clinton | 62231 |
| Germantown, Clinton | 62245 |
| Hoffman, Clinton | 62250 |
| Huey, Clinton | 62252 |
| Irishtown, Clinton | 62253 |
| Keyesport, Clinton | 62253 |
| New Baden, Clinton | 62265 |
| New Memphis, Clinton | 62266 |
| Posey, Clinton | 62231 |
| Royal Lake, Clinton | 62231 |
| Saint Morgan, Clinton | 62293 |
| Saint Rose, Clinton | 62230 |
| Santa Fe, Clinton | 62218 |
| Shattuc, Clinton | 62231 |
| Sugar Creek, Clinton | 62293 |
| Tamalco, Clinton | 62253 |
| Trenton, Clinton | 62293 |