O
- (Staffordshire) Oakamoor
- (Derby) Oakerthorpe
- (Bradford) Oakworth
- (Greater London) Old Coulsdon
- (Derby) Old Tupton
- (Peterborough) Orton Waterville
- (Kent) Ospringe
- (Hampshire) Otterbourne
- (Cornwall) Otterham
- (Kirklees) Outlane
- (City and Borough of Wakefield) Outwood
- (Calderdale) Ovenden
- (Dorset) Over Compton
- (Cumbria) Ousby
- (Cumbria) Oulton
- (Warwickshire) Offchurch
- (Leicestershire) Orton on the Hill
- (Staffordshire) Onneley
- (East Riding of Yorkshire) Ousefleet
- (North East Lincolnshire) Old Clee
- (Norfolk) Ovington
- (Suffolk) Offton
- (Lincolnshire) Oxcombe
- (Nottinghamshire) Ompton
- (Northamptonshire) Overstone
- (Norfolk) Oulton
- (Cambridgeshire) Offord Cluny
- (Lincolnshire) Orby
- (Cambridgeshire) Old Hurst
- (Cambridgeshire) Old Weston