Veľká Británia - Zoznam miest na písmeno O
- Oadby
- Oakengates
- Oakham
- Oakington
- Oakley
- Oakmere
- Oban
- Ochiltree
- Ocle Pychard
- Odell
- Odiham
- Ogmore Vale
- Okehampton
- Old Basing
- Old Harlow
- Old Kilpatrick
- Old Leake
- Old Windsor
- Oldbury
- Oldham
- Oldmeldrum
- Olney
- Olveston
- Omagh
- Orgreave
- Orkney
- Orleton
- Ormesby St Margaret
- Ormiston
- Ormskirk
- Orpington
- Orsett
- Orwell
- Ossett
- Oswestry
- Otford
- Otley
- Otterburn
- Ottershaw
- Ottery St Mary
- Ottringham
- Oughtibridge
- Oundle
- Outwell
- Over
- Overcombe
- Overstrand
- Overton
- Overtown
- Ovington
- Owston Ferry
- Oxenhope
- Oxford
- Oxted