| Ortschaft | Postleitzahl |
|---|---|
| Catawba, Clark | 43010 |
| Donnelsville, Clark | 45319 |
| Enon, Clark | 45323 |
| Medway, Clark | 45341 |
| New Carlisle, Clark | 45344 |
| North Hampton, Clark | 45349 |
| South Charleston, Clark | 45368 |
| South Vienna, Clark | 45369 |
| Springfield, Clark | 45502, 45503, 45504, 45505, 45506 |
| Tremont City, Clark | 45372 |