| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obenetto | city | Friuli-Venezia Giulia | Italy | 46.165 | 13.6397222 | 1768 | 6502 |
| Oblizza | city | Friuli-Venezia Giulia | Italy | 46.1352778 | 13.5927778 | 1614 | 8414 |
| Obranchi | city | Friuli-Venezia Giulia | Italy | 46.1583333 | 13.6361111 | 2070 | 6502 |
| Oleis | city | Friuli-Venezia Giulia | Italy | 46.0202778 | 13.3972222 | 367 | 11423 |
| Oltreacqua | city | Friuli-Venezia Giulia | Italy | 46.5169444 | 13.6408333 | 3316 | 9247 |
| Oncedis | city | Friuli-Venezia Giulia | Italy | 46.3069444 | 13.0486111 | 577 | 11008 |
| Ontagnano | city | Friuli-Venezia Giulia | Italy | 45.9025 | 13.2772222 | 52 | 11092 |
| Opcine | city | Friuli-Venezia Giulia | Italy | 45.6872222 | 13.7869444 | 1171 | 91513 |
| Opicina | city | Friuli-Venezia Giulia | Italy | 45.6872222 | 13.7869444 | 1171 | 91513 |
| Opčine | city | Friuli-Venezia Giulia | Italy | 45.6872222 | 13.7869444 | 1171 | 91513 |
| Orcenico Inferiore | city | Friuli-Venezia Giulia | Italy | 45.9563889 | 12.7858333 | 78 | 12724 |
| Orcenico Superiore | city | Friuli-Venezia Giulia | Italy | 45.9702778 | 12.8119444 | 108 | 12716 |
| Orcenico di Sopra | city | Friuli-Venezia Giulia | Italy | 45.9702778 | 12.8119444 | 108 | 12716 |
| Orgnano | city | Friuli-Venezia Giulia | Italy | 46.091667 | 13.1469444 | 383 | 11050 |
| Orgnese | city | Friuli-Venezia Giulia | Italy | 46.1869444 | 12.79 | 593 | 12667 |
| Orsaria | city | Friuli-Venezia Giulia | Italy | 46.0402778 | 13.3758333 | 282 | 11423 |
| Orton | city | Friuli-Venezia Giulia | Italy | 46.2558333 | 12.9108333 | 2585 | 12628 |
| Orzano | city | Friuli-Venezia Giulia | Italy | 46.0644444 | 13.3475 | 321 | 11058 |
| Oseacco | city | Friuli-Venezia Giulia | Italy | 46.3636111 | 13.315 | 1486 | 10998 |
| Oslavia | city | Friuli-Venezia Giulia | Italy | 45.9708333 | 13.6147222 | 275 | 18215 |
| Oslávia | city | Friuli-Venezia Giulia | Italy | 45.9708333 | 13.6147222 | 275 | 18215 |
| Osoppo | city | Friuli-Venezia Giulia | Italy | 46.2586111 | 13.0813889 | 554 | 11016 |
| Ospedaletto | city | Friuli-Venezia Giulia | Italy | 46.2980556 | 13.1238889 | 820 | 11008 |
| Ossiach | city | Friuli-Venezia Giulia | Italy | 46.1825 | 13.4983333 | 2706 | 9265 |
| Ovaro | city | Friuli-Venezia Giulia | Italy | 46.4830556 | 12.8730556 | 2995 | 10974 |
| Ovasta | city | Friuli-Venezia Giulia | Italy | 46.5030556 | 12.8494444 | 1482 | 10966 |
| Ovedasso | city | Friuli-Venezia Giulia | Italy | 46.405 | 13.2136111 | 1978 | 10988 |
| Ovoledo | city | Friuli-Venezia Giulia | Italy | 45.9775 | 12.7808333 | 111 | 12716 |
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