| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Obledo | city | Veneto | Italy | 45.85 | 11.87 | 846 | 14786 |
| Oderso | city | Veneto | Italy | 45.78 | 12.49 | 29 | 27968 |
| Oderzo | city | Veneto | Italy | 45.78 | 12.49 | 29 | 27968 |
| Ogliano | city | Veneto | Italy | 45.92 | 12.31 | 236 | 55710 |
| Oliero | city | Veneto | Italy | 45.85 | 11.67 | 830 | 11304 |
| Olàntreghe | city | Veneto | Italy | 46.29 | 12.30 | 1669 | 3524 |
| Onara | city | Veneto | Italy | 45.62 | 11.82 | 101 | 37888 |
| Oppeano | city | Veneto | Italy | 45.30 | 11.18 | 68 | 13044 |
| Oregne | city | Veneto | Italy | 46.12 | 12.07 | 958 | 9997 |
| Orgiano | city | Veneto | Italy | 45.35 | 11.47 | 88 | 12812 |
| Oriago | city | Veneto | Italy | 45.45 | 12.14 | 32 | 67992 |
| Oriago Di Mira | city | Veneto | Italy | 45.45 | 12.14 | 32 | 67992 |
| Ormelle | city | Veneto | Italy | 45.78 | 12.42 | 42 | 18038 |
| Orsago | city | Veneto | Italy | 45.93 | 12.42 | 111 | 26628 |
| Orticelli | city | Veneto | Italy | 45.08 | 12.03 | 9 | 14908 |
| Orzes | city | Veneto | Italy | 46.14 | 12.14 | 1669 | 11023 |
| Osigo | city | Veneto | Italy | 46.01 | 12.34 | 830 | 21045 |
| Ospedaletto | city | Veneto | Italy | 45.66 | 12.08 | 68 | 28013 |
| Ospedaletto Euganeo | city | Veneto | Italy | 45.22 | 11.60 | 26 | 23581 |
| Ospitale | city | Veneto | Italy | 46.33 | 12.32 | 1669 | 2305 |
| Ospitale Bellunese | city | Veneto | Italy | 46.33 | 12.32 | 1669 | 2305 |
| Ospitale di Brenta | city | Veneto | Italy | 45.62 | 11.70 | 101 | 31303 |
| Ospitale di Cadore | city | Veneto | Italy | 46.33 | 12.32 | 1669 | 2305 |
| Ossenigo | city | Veneto | Italy | 45.67 | 10.90 | 1669 | 4851 |
| Osteria Boscara | city | Veneto | Italy | 45.37 | 12.08 | 16 | 38175 |
| Osteria Boscaro | city | Veneto | Italy | 45.37 | 12.08 | 16 | 38175 |
| Osteria Marcesina | city | Veneto | Italy | 45.97 | 11.60 | 4484 | 3798 |
| Osteria del Forcelletto | city | Veneto | Italy | 45.88 | 11.75 | 4189 | 7154 |
| Osteria di Marcesina | city | Veneto | Italy | 45.97 | 11.60 | 4484 | 3798 |
| Osteria di Marcesna | city | Veneto | Italy | 45.97 | 11.60 | 4484 | 3798 |