| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Oaks | city | State of Tasmania | Australia | -41.5833333 | 146.9666667 | 531 | 295 |
| Oakwood | city | State of Tasmania | Australia | -43.1 | 147.9 | 935 | 340 |
| Oatlands | city | State of Tasmania | Australia | -42.3 | 147.3666667 | 1233 | 229 |
| Old Beach | city | State of Tasmania | Australia | -42.75 | 147.2833333 | 285 | 15490 |
| Oldin | city | State of Tasmania | Australia | -41.1 | 145.6833333 | 744 | 201 |
| Oldina | city | State of Tasmania | Australia | -41.1 | 145.6833333 | 744 | 201 |
| Oldina | city | State of Tasmania | Australia | -41.0833333 | 145.6833333 | 613 | 1790 |
| Oonah | city | State of Tasmania | Australia | -41.25 | 145.6166667 | 1177 | 154 |
| Opossum Bay | city | State of Tasmania | Australia | -43 | 147.4 | 3 | 1798 |
| Orford | city | State of Tasmania | Australia | -42.5677778 | 147.8594444 | 108 | 158 |
| Orielton | city | State of Tasmania | Australia | -42.7333333 | 147.5333333 | 334 | 4622 |
| Ormley | city | State of Tasmania | Australia | -41.7166667 | 147.8333333 | 875 | 161 |
| Osterley | city | State of Tasmania | Australia | -42.35 | 146.75 | 1161 | 33 |
| Osterly | city | State of Tasmania | Australia | -42.35 | 146.75 | 1161 | 33 |
| Ouse | city | State of Tasmania | Australia | -42.4666667 | 146.7166667 | 495 | 33 |
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