| Location | States or Territories | Abbreviation | Postcode |
|---|---|---|---|
| Cobbannah | Victoria | VIC | 3862 |
| Cobberas | Victoria | VIC | 3900 |
| Cobblebank | Victoria | VIC | 3338 |
| Cobden | Victoria | VIC | 3266 |
| Cobram, PO Boxes | Victoria | VIC | 3643 |
| Cobram | Victoria | VIC | 3644 |
| Cobram East | Victoria | VIC | 3644 |
| Cobrico | Victoria | VIC | 3266 |
| Cobungra | Victoria | VIC | 3898 |
| Coburg | Victoria | VIC | 3058 |
| Coburg North | Victoria | VIC | 3058 |
| Cocamba | Victoria | VIC | 3546 |
| Cochranes Creek | Victoria | VIC | 3475 |
| Cockatoo | Victoria | VIC | 3781 |
| Cocoroc | Victoria | VIC | 3030 |
| Codrington | Victoria | VIC | 3285 |
| Coghills Creek | Victoria | VIC | 3364 |
| Cohuna | Victoria | VIC | 3568 |
| Coimadai | Victoria | VIC | 3340 |
| Cokum | Victoria | VIC | 3542 |
