| Ortschaft | Postleitzahl |
|---|---|
| Amaranth, Dufferin | L9V, L9W |
| East Garafraxa, Dufferin | L9W |
| Grand Valley, Dufferin | L0N, L9W |
| Honeywood, Dufferin | L0N 1H0 |
| Mansfield, Dufferin | L0N 1M0 |
| Melancthon, Dufferin | L9V |
| Mono, Dufferin | L9V, L9W |
| Mulmur, Dufferin | L9V |
| Orangeville, Dufferin | L9W |
| Orton, Dufferin | L0N 1N0 |
| Shelburne, Dufferin | L0N, L9V |