| City | 2026 Pop. ↓ |
|---|---|
| Redbridge | 325,903 |
| Rotherham | 279,932 |
| Rhondda Cynon Taff | 244,568 |
| Rochdale | 240,500 |
| Richmond upon Thames | 197,060 |
| Renfrewshire | 192,252 |
| Reading | 186,096 |
| Reigate and Banstead | 162,599 |
| Redcar and Cleveland | 140,100 |
| Rushcliffe | 130,006 |
| Rugby | 126,262 |
| Rushmoor | 107,633 |
| Rother | 97,135 |
| Runnymede | 94,093 |
| Rochford | 91,091 |
| Redditch | 88,293 |
| Rossendale | 73,929 |
| Ribble Valley | 67,592 |
| Rutland | 42,142 |