Reino Unido
Países do mundo
O
- (Aberdeenshire) Oldmeldrum
- (Hampshire) Odiham
- (Cambridgeshire) Over
- (Norfolk) Ormesby St Margaret
- (Cheshire West and Chester) Over
- Oakley
- (Bridgend county borough) Ogmore Vale
- (Fife) Oakley
- (North Lanarkshire) Overtown
- (East Lothian) Ormiston
- Oxenhope
- (Cambridgeshire) Oakington
- (Borough of Thurrock) Orsett
- (Lincolnshire) Old Leake
- (North Lincolnshire) Owston Ferry
- (East Ayrshire) Ochiltree
- (Lancashire) Overton
- (Cambridgeshire) Orwell
- (Norfolk) Overstrand
- (South Gloucestershire) Olveston
- (Buckinghamshire) Oakley
- (Wiltshire) Old Sarum
- (Hampshire) Over Wallop
- Overton
- (Vale of Glamorgan) Ogmore-by-Sea
- (Suffolk) Old Newton
- (Hampshire) Owslebury
- (Norfolk) Old Buckenham
- (Somerset) Odcombe
- (Somerset) Oakhill