| City | 2026 Pop. ↓ |
|---|---|
| Sheffield | 588,768 |
| Sandwell | 360,389 |
| South Lanarkshire | 337,675 |
| Shropshire | 337,480 |
| Southwark | 317,223 |
| South Gloucestershire | 314,483 |
| Stockport | 307,537 |
| Salford | 306,062 |
| Sunderland | 291,624 |
| Sefton | 288,723 |
| Stoke-on-Trent | 274,194 |
| Southampton | 262,823 |
| Swansea | 254,040 |
| Swindon | 249,070 |
| Solihull | 223,421 |
| Sutton | 217,602 |
| Stockton-on-Tees | 209,330 |
| St. Helens | 191,293 |
| Southend-on-Sea | 186,629 |
| South Cambridgeshire | 176,714 |
| Slough | 171,455 |
| Swale | 162,085 |
| South Oxfordshire | 160,319 |
| South Norfolk | 152,906 |
| South Tyneside | 152,334 |
| Stratford-on-Avon | 152,038 |
| St Albans | 151,943 |
| South Kesteven | 149,047 |
| Stafford | 143,961 |
| Stroud | 127,751 |
| Sevenoaks | 123,891 |
| South Derbyshire | 122,415 |
| South Ribble | 117,547 |
| Scottish Borders | 117,450 |
| South Staffordshire | 115,499 |
| South Ayrshire | 112,260 |
| Spelthorne | 108,772 |
| South Holland | 101,291 |
| Staffordshire Moorlands | 96,551 |
| Surrey Heath | 95,771 |
| Stirling | 94,964 |
| South Hams | 93,911 |
| Stevenage | 92,756 |
| Shetland Islands | 23,150 |