North West
O
- Oak Bank
- Oak Hill Park
- Oak Vale Park
- Oak, Hollow
- Oakbank, North West
- Oakbank, Cumberland
- Oakdale, Wirral
- Oaken Bottom
- Oaken Clough
- Oakenclough
- Oakenhead Wood
- Oakenhurst
- Oakenrod
- Oakenshaw, Hyndburn
- Oakfield, Trafford
- Oakgrove
- Oakhanger, North West
- Oakley, Rossendale
- Oat Hill
- Occlestone Green
- Oddendale
- Offerton, North West
- Offerton Fold
- Offerton Green
- Ogden, Higher
- Oglet
- Old Birtle
- Old Boston
- Old Brathay
- Old Carlisle
- Old Fold, Wigan
- Old Glasson
- Old Grange
- Old Hall
- Old Hive
- Old Hutton
- Old Hyton
- Old Langho
- Old Mawbray
- Old Moss
- Old Pale, The
- Old Roan Station
- Old Scale
- Old Sirs
- Old Swan
- Old Tame
- Old Tebay
- Old Town, Cumberland
- Old Town, Westmorland and Furness
- Old Trafford
- Old Village, The
- Old Wennington
- Oldcastle Heath
- Oldfield, Wirral
- Oldfield Brow
- Oldhall Green, North West
- Oldham
- Oldham Edge
- Oldwall
- Olive Mount
- Ollerton Fold
- Onston
- Oozewood
- Openshaw
- Openshaw, Higher
- Openshaw, Lower
- Ordsall, Salford
- Orford, Warrington
- Organsdale
- Ormathwaite
- Ormsgill
- Ormskirk
- Orrell, North West
- Orrell, Wigan
- Orrell Park
- Orrell Post
- Orrest, Far
- Orthwaite
- Ortner
- Orton Rigg
- Orton, Great
- Orton, Little, North West
- Osbaldeston
- Osbaldeston Green
- Oscroft
- Osmotherley
- Oswaldtwistle
- Otterspool
- Oubas Hill
- Oughterby
- Oughterside
- Oughtrington
- Oulder Hill
- Oulton, North West
- Oultonlowe Green
- Ousby
- Out Rawcliffe
- Outcast
- Outgate
- Outwood, North West
- Outwood Gate
- Over, North West
- Over Burrow
- Over Houses, Pendle
- Over Hulton
- Over Kellet
- Over Knutsford
- Over Leck
- Over Silton
- Over Tabley
- Over Town
- Overby
- Overchurch
- Overend, North West
- Overend, Cumberland
- Overend, Westmorland and Furness
- Overhulton
- Overpool
- Oversley
- Oversley Ford
- Overton, North West
- Overton, Cheshire West and Chester
- Overton Green
- Overtown, Burnley
- Overtown, Lancaster
- Owermoigne
- Owler Barrow
- Owley Wood
- Ox Hey
- Oxcliffe
- Oxen Fell High Cross
- Oxenholme
- Oxenpark
- Oxpens
- Oxton, Wirral