Ol
- Old Aberdeen
- Old Bar
- Old Bedford River
- Old Bolingbroke
- Old Boston
- Old Brampton
- Old Bridge of Urr
- Old Buckenham
- Old Byland
- Old Castle Head
- Old Clee
- Old Cluden
- Old Cluden Water
- Old Colwyn
- Old Dalby
- Old Deer
- Old Drumrunie Lodge
- Old Hall Bay
- Old Head
- Old Hill
- Old Hill
- Old Horse Rocks
- Old Hurst
- Old Hutton
- Old Jedward
| - Old Kilpatrick
- Old Law
- Old Leake
- Old Leake Station
- Old Lighthouse Island
- Old Lynn Channel
- Old Malden
- Old Malton
- Old Man
- Old Man
- Old Man
- Old Man of Coniston
- Old Man of Hoy
- Old Man of Wick
- Old Mawbray
- Old Milverton
- Old Monkland
- Old Nab
- Old Newton
- Old North Road Station
- Old Penshaw
- Old Pepper Rock
- Old Polmaise
- Old Radnor
- Old Rayne
| - Old Rocks
- Old Romney
- Old Ryland
- Old Sarum
- Old Skerries
- Old Slains Castle
- Old Somerby
- Old South Middle
- Old Town
- Old Walker
- Old Wall
- Old Warden
- Old Water
- Old Water of Cluden
- Old Weston
- Old Windsor
- Oldany
- Oldany Island
- Oldbury
- Oldbury
- Oldbury
- Oldbury
- Oldbury on the Hill
- Oldbury upon Severn
- Oldbury-on-Severn
| - Oldcastle
- Olderfleet Castle
- Oldfield Hill
- Oldham
- Oldhamstocks
- Oldmeldrum
- Oldshore
- Oldshore Beg
- Oldshore More
- Oldshoremore
- Oldways End
- Oliver's Mount
- Ollaberry
- Ollach
- Ollerton
- Ollisdal
- Ollisdal Geo
- Olna Firth
- Olney
- Olrig
- Olrig House
- Olton
- Olveston
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