| City | 2026 Pop. ↓ |
|---|---|
| Cornwall | 591,594 |
| County Durham | 543,515 |
| Cheshire East | 431,445 |
| Croydon | 415,854 |
| Cardiff | 391,495 |
| Cheshire West and Chester | 379,280 |
| Coventry | 378,024 |
| Central Bedfordshire | 326,829 |
| Camden | 216,045 |
| Calderdale | 211,806 |
| Colchester | 204,204 |
| Chelmsford | 192,408 |
| Carmarthenshire | 192,251 |
| Charnwood | 192,008 |
| Caerphilly | 176,555 |
| Cherwell | 175,688 |
| Canterbury | 163,454 |
| Cambridge | 153,084 |
| Chichester | 131,388 |
| Crawley | 126,608 |
| Chorley | 122,794 |
| Cheltenham | 122,657 |
| Conwy | 114,783 |
| Chesterfield | 106,411 |
| Cannock Chase | 105,611 |
| Cotswold | 93,139 |
| Castle Point | 90,969 |
| Ceredigion | 72,351 |
| Clackmannanshire | 52,233 |
| City of London | 16,700 |