- Oakerthorpe
- Oakhill
- Oakington
- Oakle Street
- Oaksey
- Oakworth
- Oare
- Oatlands Park
- Occold
- Ockham
- Odcombe
- Oddington
- Odiham
- Odstock
- Offchurch
- Offenham
- Offham
- Offord Cluny
- Offton
- Offwell
- Ogbourne Saint Andrew
- Okehampton
- Okeover
- Old Bolingbroke
- Old Boston
- Old Brampton
- Old Buckenham
- Old Byland
- Old Clee
- Old Coulsdon