- Cadishead, Greater Manchester
- Caernarfon, Gwynedd
- Caerphilly, Caerphilly
- Caister On Sea, Norfolk
- Caistor, Lincolnshire
- Caldicot, Monmouthshire,
- Callander, Stirling
- Calne, Wiltshire
- Calverton, Nottinghamshire
- Cam, Gloucestershire
- Camberley, Surrey
- Camborne, Cornwall
- Cambridge, Cambridgeshire
- Camden, Camden,
- Cannock, Staffordshire
- Canterbury, Kent
- Canvey Island, Essex
- Carbis Bay, Cornwall
- Cardiff, Cardiff
- Carlisle, Cumbria
- Carluke, South Lanarkshire
- Carmarthen, Carmarthenshire
- Carnforth, Lancashire
- Carnlough, Co. Antrim
- Carnoustie, Angus
- Carrickfergus, Co. Antrim
- Carryduff, Co. Antrim
- Carshalton, Sutton
- Carterton, Oxfordshire
- Castle Bromwich, West Midlands
- Castle Cary, Somerset
- Castle Donington, Leicestershire
- Castle Douglas, Dumfries and Galloway
- Castle Vale, West Midlands
- Castledawson, Co. Londonderry
- Castlederg, Co. Tyrone
- Castleford, West Yorkshire
- Castlereagh, Co. Antrim
- Castlewellan, Co. Down
- Caterham, Surrey
- Catford, Lewisham
- Cattrick Garrison, North Yorkshire
- Cefn Mawr, Wrexham
- Chadderton, Greater Manchester
- Chadwell Heath, Barking and Dagenham
- Chalfont St Giles, Buckinghamshire
- Chandler's Ford, Hampshire
- Chapel En Le Frith, Derbyshire
- Chapel St Leonards, Lincolnshire
- Chard, Somerset
- Charlbury, Oxfordshire
- Charlton, Greenwich
- Charlton Kings, Gloucestershire
- Chatham, Kent
- Chatteris, Cambridgeshire
- Cheadle, Greater Manchester
- Cheadle, Staffordshire
- Cheadle Hulme, Greater Manchester
- Cheddar, Somerset
- Cheetham Hill, Greater Manchester
- Chellaston, Derbyshire
- Chelmsford, Essex
- Chelmsley Wood, West Midlands
- Chelsea, Kensington and Chelsea
- Cheltenham, Gloucestershire
- Chepstow, Monmouthshire
- Chertsey, Surrey
- Chesham, Buckinghamshire
- Chesham Bois, Buckinghamshire
- Cheshunt, Hertfordshire
- Cheslyn Hay, Staffordshire
- Chessington, Kingston-Upon-Thames
- Chester, Cheshire
- Chester Le Street, Co. Durham
- Chesterfield, Derbyshire
- Chichester, West Sussex
- Chigwell, Essex
- Chilcompton, Somerset
- Chineham, Hampshire
- Chingford, Waltham Forest
- Chinnor, Oxfordshire
- Chippenham, Wiltshire
- Chipping Norton, Oxfordshire
- Chipping Ongar, Essex
- Chipping Sodbury, South Gloucestershire
- Chiseldon, Wiltshire
- Chislehurst, Bromley
- Chiswick, Hounslow
- Cholsey, Oxfordshire
- Choppington, Northumberland
- Chorley, Lancashire
- Chorleywood, Hertfordshire
- Christchurch, Dorset
- Church Stretton, Shropshire
- Church Village, Rhondda Cynon Taff
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- Churchdown, Gloucestershire
- Cinderford, Gloucestershire
- Cirencester, Gloucestershire
- City Of London, City Of London
- City Of Westminster, City Of Westminster
- Clacton On Sea, Essex
- Clay Cross, Derbyshire
- Clayhall, Redbridge
- Clayton-le-Moors, Lancashire
- Clayton West, West Yorkshire
- Cleator Moor, Cumbria
- Cleethorpes, North East Lincolnshire
- Clevedon, Somerset
- Cleveleys, Lancashire
- Clitheroe, Lancashire
- Clydebank, West Dunbart
- Coagh, Co. Tyrone
- Coalbrookedale, Shropshire
- Coalisland, Co. Tyrone
- Coalville, Leicestershire
- Coatbridge, North Lanarkshire
- Cobham, Surrey
- Cockenzie, East Lothian
- Cockermouth, Cumbria
- Codsall, Staffordshire
- Coggeshall, Essex
- Colchester, Essex
- Coldstream, Scottish Borders
- Coleford, Gloucestershire
- Colehall, West Midlands
- Coleraine, Co. Londonderry
- Coleshill, Warwickshire
- Colwyn Bay, Conwy
- Combe Martin, Devon
- Comber, Co. Down
- Congleton, Cheshire
- Congresbury, Somerset
- Conisbrough, South Yorkshire
- Connah's Quay, Flintshire
- Consett, Co. Durham
- Conwy, Conwy
- Cookstown, Co. Tyrone
- Corbridge, Northumberland
- Corby, Northamptonshire
- Corfe Mullen, Dorset
- Corringham, Essex
- Corsham, Wiltshire
- Cosby, Leicestershire
- Cotgrave, Nottinghamshire
- Coulsdon, Croydon
- Coventry, West Midlands
- Cowbridge, Vale Of Glamorgan
- Cowdenbeath, Fife
- Cowes, Isle Of Wight
- Craigavad, Co. Down
- Craigavon, Co. Armagh
- Crail, Fife
- Cramlington, Northumberland
- Cranbrook, Kent
- Cranford, Hounslow
- Cranleigh, Surrey
- Crawley, West Sussex
- Crayford, Kent
- Crediton, Devon
- Creswell, Nottinghamshire
- Crewe, Cheshire
- Crewkerne, Somerset
- Criccieth, Gwynedd
- Cricklade, Wiltshire
- Cricklewood, Barnet
- Crieff, Perth and Kinross
- Cromarty, Highland
- Cromer, Norfolk
- Crook, Co. Durham
- Crosby, Merseyside
- Crossgar, Co. Down
- Crossmaglen, Co. Armagh
- Crowborough, East Sussex
- Crowland, Lincolnshire
- Crowle, North Lincolnshire
- Crowthorne, Berkshire
- Croxley Green, Hertfordshire
- Croydon, Croydon
- Crumlin, Co. Antrim
- Crystal Palace, Lewisham
- Cudworth, South Yorkshire
- Cullen, Moray
- Cullompton, Devon
- Cullybackey, Co. Antrim
- Cumbernauld, North Lanarkshire
- Cumnock, East Ayrshire
- Cupar, Fife
- Cwmbran, Torfaen
- Cwmllynfell, Neath Port Talbot
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