| Maine State Locator Citys, Towns, Villages, and Other beginning with the letter O |
| CITY/TOWN/ VILLAGE/ETC. |
LOCATED IN THIS TOWN |
COUNTY | STATE |
| Oakfield | Oakfield | Aroostook | Maine |
| Oak Hill | Scarborough | Cumberland | Maine |
| Oakland | Oakland | Kennebec | Maine |
| Ocean Park | Old Orchard Beach | York | Maine |
| Ocean Point | Boothbay | Lincoln | Maine |
| Oceanville | Stonington | Hancock | Maine |
| Ogontz | Rockwood | Somerset | Maine |
| Ogunquit | Ogunquit | York | Maine |
| Olamon | Passadumkeag | Penobscot | Maine |
| Old Orchard Beach | Old Orchard Beach | York | Maine |
| Old Town | Old Town | Penobscot | Maine |
| Onawa | Monson | Piscataquis | Maine |
| Oquossoc | Rangeley Plateau | Franklin | Maine |
| Orient | Orient | Aroostook | Maine |
| Orland | Orland | Hancock | Maine |
| Ornville | Ornville | Piscataquis | Maine |
| Orono | Orono | Penobscot | Maine |
| Orrington | Orrington | Penobscot | Maine |
| Orrington Center | Orrington | Penobscot | Maine |
| Orrs Island | Harpswell | Cumberland | Maine |
| Osborn | Osborn | Hancock | Maine |
| Otis | Otis | Hancock | Maine |
| Otisfield | Harrison | Cumberland | Maine |
| Otter Creek | Northeast Harbor | Hancock | Maine |
| Owls Head | Owls Head | Knox | Maine |
| Oxbow Plateau | Oxbow Plateau | Aroostook | Maine |
| Oxford | Oxford | Oxford | Maine |