O
- (Norfolk) Oxborough
- (Lancashire) Oakenclough
- (Somerset) Otterhampton
- (Kent) Old Romney
- (Worcestershire) Offenham
- (North Yorkshire) Old Malton
- (North Yorkshire) Oulston
- (North Yorkshire) Old Byland
- (East Sussex) Old Heathfield
- (Oxfordshire) Over Worton
- (Oxfordshire) Oddington
- (Warwickshire) Old Milverton
- (Somerset) Otterford
- (Somerset) Oake
- (North Yorkshire) Over Silton
- (East Riding of Yorkshire) Out Newton
- (North Yorkshire) Oxton
- (Gloucestershire) Oakle Street
- (Worcestershire) Overbury
- (Devon) Outer Hope
- (Kent) Orlestone
- (Shropshire) Onibury
- (Kent) Otterden
- (Cumbria) Old Hutton
- (Surrey) Oatlands Park
- (Cumbria) Outhgill
- (East Sussex) Old Town
- (St. Helens) Old Boston
- (Sandwell) Old Hill
- (Warwickshire) Over Whitacre