O
| Postcode | Location |
|---|---|
| 5291 | OB Flat |
| 5243 | Oakbank |
| 5086 | Oakden |
| 5046 | Oaklands Park |
| 5158 | O'Halloran Hill |
| 5440 | Olary |
| 5168 | Old Noarlunga |
| 5725 | Olympic Dam |
| 5114 | One Tree Hill |
| 5163 | Onkaparinga Hills |
| 5734 | Oodnadatta |
| 5431 | Orroroo |
| 5017 | Osborne |
| 5166 | O'sullivan Beach |
| 5013 | Ottoway |
| 5018 | Outer Harbor |
| 5082 | Ovingham |
| 5460 | Owen |
Read more about this topic: List Of Postcodes In South Australia