| Place | Post Code |
|---|---|
| Baerami, Muswellbrook | 2333 |
| Baerami Creek, Muswellbrook | 2333 |
| Bengalla, Muswellbrook | 2333 |
| Bureen, Muswellbrook | 2328 |
| Castle Rock, Muswellbrook | 2333 |
| Dalswinton, Muswellbrook | 2328 |
| Denman, Muswellbrook | 2328 |
| Edderton, Muswellbrook | 2333 |
| Giants Creek, Muswellbrook | 2328 |
| Hollydeen, Muswellbrook | 2328 |
| Kayuga, Muswellbrook | 2333 |
| Kerrabee, Muswellbrook | 2328 |
| Mangoola, Muswellbrook | 2328 |
| Manobalai, Muswellbrook | 2333 |
| Martindale, Muswellbrook | 2328 |
| McCullys Gap, Muswellbrook | 2333 |
| Muscle Creek, Muswellbrook | 2333 |
| Muswellbrook, Muswellbrook | 2333 |
| Rouchel Brook, Muswellbrook | 2336 |
| Sandy Hollow, Muswellbrook | 2333 |
| Widden, Muswellbrook | 2328 |
| Wybong, Muswellbrook | 2333 |
| Yarrawa, Muswellbrook | 2328 |