Sitemap by letter "O"
- Oadby, Leicestershire
- Oakamoor, Staffordshire
- Oake, Somerset
- Oakengates, Telford and Wrekin
- Oakford, Devon
- Oakham, Rutland
- Oak Hangar, Hampshire
- Oakhill, Somerset
- Oakington, Cambridgeshire
- Oakle Street, Gloucestershire
- Oakley, Bedford
- Oakley, Hampshire
- Oakley, Fife
- Oakley, Buckinghamshire
- Oaksey, Wiltshire
- Oakworth, Bradford
- Oare, Kent
- Oare, Wiltshire
- Oathlaw, Angus
- Oatlands Park, Surrey
- Oban, Argyll and Bute
- Obbe, Eilean Siar
- Obinan, Highland
- Occold, Suffolk
- Occumster, Highland
- Ochiltree, East Ayrshire
- Ochtow, Highland
- Ockham, Surrey
- Ockle, Highland
- Ockley, Surrey
- Ocle Pychard, Herefordshire
- Oddington, Oxfordshire
- Odell, Bedford
- Odiham, Hampshire
- Odstock, Wiltshire
- Offchurch, Warwickshire
- Offenham, Worcestershire
- Offham, East Sussex
- Offham, Kent
- Offord Cluny, Cambridgeshire
- Offord D'Arcy, Cambridgeshire
- Offton, Suffolk
- Offwell, Devon
- Ogbourne Saint Andrew, Wiltshire
- Ogbourne Saint George, Wiltshire
- Ogmore, Vale of Glamorgan, The
- Ogmore-by-Sea, Vale of Glamorgan, The
- Ogmore Vale, Bridgend
- Okehampton, Devon
- Okeover, Staffordshire
- Old Aberdeen, Aberdeen City
- Oldany, Highland
- Old Bolingbroke, Lincolnshire
- Old Boston, St. Helens
- Old Brampton, Derbyshire
- Old Bridge of Urr, Dumfries and Galloway
- Old Buckenham, Norfolk
- Oldbury, Warwickshire
- Oldbury, Sandwell
- Oldbury-on-Severn, South Gloucestershire
- Oldbury on the Hill, Gloucestershire
- Old Byland, North Yorkshire
- Oldcastle, Monmouthshire
- Old Clee, North East Lincolnshire
- Old Colwyn, Conwy
- Old Dalby, Leicestershire
- Old Deer, Aberdeenshire
- Oldham, Oldham
- Oldhamstocks, Scottish Borders
- Old Hill, Sandwell
- Old Hurst, Cambridgeshire
- Old Hutton, Cumbria
- Old Kilpatrick, West Dunbartonshire
- Old Leake, Lincolnshire
- Old Malton, North Yorkshire
- Oldmeldrum, Aberdeenshire
- Old Milverton, Warwickshire
- Old Monkland, North Lanarkshire
- Old Newton, Suffolk
- Old Penshaw, Sunderland
- Old Radnor, Powys
- Old Rayne, Aberdeenshire
- Old Romney, Kent
- Old Sarum, Wiltshire
- Oldshore, Highland
- Oldshore Beg, Highland
- Oldshoremore, Highland
- Old Somerby, Lincolnshire
- Old Town, East Sussex
- Old Walker, Newcastle upon Tyne
- Old Warden, Central Bedfordshire
- Oldways End, Somerset
- Old Weston, Cambridgeshire
- Old Windsor, Windsor and Maidenhead
- Ollaberry, Shetland Islands
- Ollach, Highland
- Ollerton, Nottinghamshire
- Olney, Milton Keynes
- Olton, Solihull
- Olveston, South Gloucestershire
- Omagh, Fermanagh and Omagh
- Ombersley, Worcestershire
- Ompton, Nottinghamshire
- Onecote, Staffordshire
- Onibury, Shropshire
- Onich, Highland
- Onllwyn, Neath Port Talbot
- Onneley, Staffordshire
- Openshaw, Manchester
- Oragaig, Argyll and Bute
- Orbliston, Moray
- Orbost, Highland
- Orby, Lincolnshire
- Orcheston, Wiltshire
- Ord, Highland
- Ordie, Aberdeenshire
- Ore, East Sussex
- Orford, Suffolk
- Orgreave, Rotherham
- Oritor, Mid-Ulster
- Orlestone, Kent
- Orleton, Herefordshire
- Orlingbury, Northamptonshire
- Ormesby, Middlesbrough
- Ormesby Saint Margaret, Norfolk
- Ormiston, East Lothian
- Ormskirk, Lancashire
- Orphir, Orkney Islands
- Orpington, Bromley
- Orsett, Thurrock
- Orston, Nottinghamshire
- Orton, Cumbria
- Orton on the Hill, Leicestershire
- Orton Waterville, Peterborough
- Orwell, Cambridgeshire
- Osborne, Isle of Wight
- Osbournby, Lincolnshire
- Osmaston, Derbyshire
- Osmington, Dorset
- Osmotherley, North Yorkshire
- Ospringe, Kent
- Ossett, Wakefield
- Ossington, Nottinghamshire
- Oswaldkirk, North Yorkshire
- Oswaldtwistle, Lancashire
- Oswestry, Shropshire
- Otford, Kent
- Othery, Somerset
- Otley, Leeds
- Otley, Suffolk
- Otterbourne, Hampshire
- Otterburn, Northumberland
- Otterden, Kent
- Otter Ferry, Argyll and Bute
- Otterford, Somerset
- Otterham, Cornwall
- Otterhampton, Somerset
- Ottershaw, Surrey
- Otterton, Devon
- Ottery Saint Mary, Devon
- Ottringham, East Riding of Yorkshire
- Oughtibridge, Sheffield
- Oulston, North Yorkshire
- Oulton, Suffolk
- Oulton, Norfolk
- Oulton, Cumbria
- Oundle, Northamptonshire
- Ousby, Cumbria
- Ousden, Suffolk
- Ousefleet, East Riding of Yorkshire
- Outhgill, Cumbria
- Out Newton, East Riding of Yorkshire
- Outwell, Norfolk
- Ovenden, Calderdale
- Over, Cheshire West and Chester
- Over, Cambridgeshire
- Overbury, Worcestershire
- Overcombe, Dorset
- Over Compton, Dorset
- Over Kellet, Lancashire
- Overscaig, Highland
- Overseal, Leicestershire
- Over Silton, North Yorkshire
- Overstone, Northamptonshire
- Overstrand, Norfolk
- Overton, Wrexham
- Overton, Lancashire
- Overton, Hampshire
- Overtown, North Lanarkshire
- Over Wallop, Hampshire
- Over Whitacre, Warwickshire
- Over Worton, Oxfordshire
- Oving, Buckinghamshire
- Oving, West Sussex
- Ovingdean, Brighton and Hove
- Ovingham, Northumberland
- Ovington, Hampshire
- Ovington, Essex
- Ovington, Norfolk
- Ower, Hampshire
- Owermoigne, Dorset
- Owmby, Lincolnshire
- Owslebury, Hampshire
- Owston, Leicestershire
- Owston Ferry, Lincolnshire
- Oxborough, Norfolk
- Oxcombe, Lincolnshire
- Oxenhope, Bradford
- Oxenwood, Wiltshire
- Oxford, Oxfordshire
- Oxhill, Warwickshire
- Oxnam, Scottish Borders
- Oxshott, Surrey
- Oxted, Surrey
- Oxton, Scottish Borders
- Oxton, Nottinghamshire
- Oxton, North Yorkshire
- Oxwich, Swansea
- Oykell Bridge, Highland
- Oyne, Aberdeenshire
- Oystermouth, Swansea