| City | Region |
|---|
| ›Caerleon | Wales› |
| ›Caernarfon | Wales› |
| ›Caerphilly | Wales› |
| ›Caldicot | Wales› |
| ›California | Derbyshire› |
| ›Callander | Stirling› |
| ›Calmsden | Gloucestershire› |
| ›Camborne | Cornwall› |
| ›Cambridge | Cambridgeshire› |
| ›Cambridge | Gloucestershire› |
| ›Campbeltown | Argyll and Bute (Kintyre)› |
| ›Cannock | Staffordshire› |
| ›Cannop | Gloucestershire› |
| ›Canterbury | Kent› |
| ›Cantley | Norfolk› |
| ›Canvey Island | Essex› |
| ›Capel Bangor | Wales› |
| ›Cardiff | Wales› |
| ›Cardigan | Wales› |
| ›Carlisle | Cumbria› |
| ›Carlton | Nottinghamshire› |
| ›Carmarthen | Wales› |
| ›Carsington | Derbyshire› |
| ›Castle Douglas | Dumfries and Galloway› |
| ›Castletown | Isle of Man› |
| ›Cefn-Mawr | Wales› |
| ›Cefn-y-bedd | Wales› |
| ›Cefn-y-bedd | Wales› |
| ›Central Lydbrook | Gloucestershire› |
| ›Chalford | Gloucestershire› |
| ›Chard | Somerset› |
| ›Charlestown | Cornwall› |
| ›Chatham | Kent› |
| ›Chaxhill | Gloucestershire› |
| ›Cheddar | Somerset› |
| ›Chelmsford | Essex› |
| ›Cheltenham | Gloucestershire› |
| ›Chepstow | Wales› |
| ›Cheshunt | Greater London› |
| ›Chester | Cheshire› |
| ›Chesterfield | Derbyshire› |
| ›Chichester | West Sussex› |
| ›Chippenham | Wiltshire› |
| ›Chipping Norton | Oxfordshire› |
| ›Chirk | Wales› |
| ›Chrch Stoke | Wales› |
| ›Christchurch | Dorset› |
| ›Cinderford | Gloucestershire› |
| ›Cirencester | Gloucestershire› |
| ›Clevedon | North Somerset› |
| ›Cliffe | Kent› |
| ›Clovelly | Devon› |
| ›Clydebank | Dumbarton› |
| ›Coalville | Leicestershire› |
| ›Coalway | Gloucestershire› |
| ›Cockermouth | Cumbria› |
| ›Colchester | Essex› |
| ›Coleford | Gloucestershire› |
| ›Colwyn Bay | Wales› |
| ›Compton Dundon | Somerset› |
| ›Congresbury | North Somerset› |
| ›Connahs Quay | Wales› |
| ›Consett | Durham› |
| ›Conwy | Wales› |
| ›Corby | Northamptonshire› |
| ›Corwen | Wales› |
| ›Coryton | Essex› |
| ›Coventry | West Midlands› |
| ›Coverack | Cornwall› |
| ›Cowbridge | Wales› |
| ›Cowes | Isle of Wight› |
| ›Crediton | Devon› |
| ›Creigiau | Wales› |
| ›Crewe | Cheshire› |
| ›Criccieth | Wales› |
| ›Cromer | Norfolk› |
| ›Crook | Durham› |
| ›Crosby | Isle of Man› |
| ›Cross Hands | Wales› |
| ›Crowcombe | Somerset› |
| ›Croxdale | Durham› |
| ›Croydon | Greater London› |
| ›Crudgington | Shropshire› |
| ›Cuckfield | West Sussex› |
| ›Cumnock | East Ayrshire› |
| ›Cupar | Fife› |
| ›Cwmbran | Wales› |
