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- Oakfield (Genesee County)
- Ocean Beach (Suffolk County)
- Odessa (Schuyler County)
- Old Brookville (Nassau County)
- Old Field (Suffolk County)
- Old Westbury (Nassau County)
- Oneida Castle (Oneida County)
- Orchard Park (Erie County)
- Oriskany (Oneida County)
- Oriskany Falls (Oneida County)
- Ossining (Westchester County)
- Otego (Otsego County)
- Otisville (Orange County)
- Ovid (Seneca County)
- Owego (Tioga County)
- Oxford (Chenango County)
- Oyster Bay Cove (Nassau County)
Read more about this topic: List Of Villages In New York