| Post Office | Marietta |
| Division | Washington |
| Pincode | 45750 |
| Post Office | Belpre |
| Division | Washington |
| Pincode | 45714 |
| Post Office | Vincent |
| Division | Washington |
| Pincode | 45784 |
| Post Office | Waterford |
| Division | Washington |
| Pincode | 45786 |
| Post Office | Little Hocking |
| Division | Washington |
| Pincode | 45742 |
| Post Office | Lowell |
| Division | Washington |
| Pincode | 45744 |