| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Oderzo | city | Veneto | Italy | 45.78 | 12.4880556 | 29 | 32299 |
| Ogliano | city | Veneto | Italy | 45.9155556 | 12.3141667 | 236 | 32225 |
| Olantreghe | city | Veneto | Italy | 46.2913889 | 12.2969444 | 1551 | 7465 |
| Olàntreghe | city | Veneto | Italy | 46.2913889 | 12.2969444 | 1551 | 7465 |
| Oriago | city | Veneto | Italy | 45.4522222 | 12.1405556 | 32 | 35141 |
| Ormelle | city | Veneto | Italy | 45.7794444 | 12.4158333 | 42 | 32299 |
| Orsago | city | Veneto | Italy | 45.9322222 | 12.4208333 | 111 | 26197 |
| Orticelli | city | Veneto | Italy | 45.075 | 12.03 | 9 | 15543 |
| Orzes | city | Veneto | Italy | 46.1383333 | 12.1413889 | 1515 | 6007 |
| Orzès | city | Veneto | Italy | 46.1383333 | 12.1413889 | 1515 | 6007 |
| Osigo | city | Veneto | Italy | 46.069444 | 12.3416667 | 3973 | 21484 |
| Ospedaletto | city | Veneto | Italy | 45.6608333 | 12.0755556 | 68 | 35379 |
| Ospitale | city | Veneto | Italy | 46.3313889 | 12.3205556 | 1545 | 7009 |
| Ospitale Bellunese | city | Veneto | Italy | 46.3313889 | 12.3205556 | 1545 | 7009 |
| Ospitale di Cadore | city | Veneto | Italy | 46.3313889 | 12.3205556 | 1545 | 7009 |
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