| Location | States or Territories | Abbreviation | Postcode |
|---|---|---|---|
| Osborne Park, Garden Park PO Boxes 700–762 | Western Australia | WA | 6916 |
| Osborne Park, PO Boxes 1–509 | Western Australia | WA | 6917 |
| Osborne Park Delivery Centre | Western Australia | WA | 6017 |
| Osborne Park Delivery Centre, PO Boxes 1001–1960 | Western Australia | WA | 6916 |
| Osmington | Western Australia | WA | 6285 |
