| Post Office | Grafton |
| Division | Walsh |
| Pincode | 58237 |
| Post Office | Park River |
| Division | Walsh |
| Pincode | 58270 |
| Post Office | Minto |
| Division | Walsh |
| Pincode | 58261 |
| Post Office | Hoople |
| Division | Walsh |
| Pincode | 58243 |
| Post Office | Edinburg |
| Division | Walsh |
| Pincode | 58227 |
| Post Office | Adams |
| Division | Walsh |
| Pincode | 58210 |