Or
- Oragaig
- Orbliston
- Orbliston Junction
- Orbost
- Orby
- Orchard
- Orchardton
- Orchardton Bay
- Orchardton House
- Orcheston
- Orchy
- Ord
- Ord
- Ord
- Ord Hill
- Ord Hill of Kessock
- Ord Point
- Ord of Caithness
- Ordie
- Ordie Burn
- Ore
- Ore Bay
- Ore Stone
| - Orestone
- Oreval
- Oreval Mountain
- Orfasay
- Orfasy Island
- Orford
- Orford Ness
- Orgreave
- Orinsay Island
- Oritor
- Orka Voe
- Orkney
- Orkney
- Orkney Islands
- Orkney Islands
- Orkney Islands Area
- Orkneys
- Orlando
- Orlands
- Orlestone
- Orleton
- Orlingbury
- Orlock Point
| - Ormal
- Ormeau
- Ormeau Park
- Ormes Bay
- Ormesby
- Ormesby Saint Margaret
- Ormidale
- Ormidale House
- Ormiston
- Ormsary
- Ormsary House
- Ormside
- Ormskirk
- Ormul
- Ornish
- Ornish Point
- Ornsay
- Ornsay
- Ornsay
- Ornsay Island
- Oronsay
- Oronsay
- Oronsay
| - Oronsay
- Oronsay
- Orosay
- Orosay
- Orosay
- Orosay
- Orphir
- Orpington
- Orra More
- Orsay Island
- Orsett
- Orston
- Orston Camp
- Orton
- Orton
- Orton Station
- Orton Waterville
- Orton on the Hill
- Orval
- Orwell
- Orwell Station
- Orwich Bay
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