Reino Unido
Países del mundo
O
- (City and County of Swansea) Oystermouth
- (Suffolk) Ousden
- (Derby) Old Brampton
- Oval
- Orgreave
- (Redcar and Cleveland) Ormesby
- (Monmouthshire) Oldcastle
- (Devon) Oldways End
- (Isle of Wight) Osborne
- Offord D'Arcy
- (Warwickshire) Over Whitacre
- (Sandwell) Old Hill
- (Dumfries and Galloway) Old Bridge of Urr
- Old Bailey
- Oxford Street
- Oxford Circus
- (Aberdeenshire) Ordie
- (St. Helens) Old Boston
- (East Sussex) Old Town
- (Cumbria) Outhgill
- (Vale of Glamorgan) Ogmore
- (Surrey) Oatlands Park
- (Highland) Ollach
- (Cumbria) Old Hutton
- Owmby
- (Kent) Otterden
- (Shropshire) Onibury
- (Kent) Orlestone
- (Devon) Outer Hope
- (Worcestershire) Overbury