| City | 2026 Pop. ↓ |
|---|---|
| Manchester | 605,521 |
| Milton Keynes | 314,541 |
| Medway | 296,482 |
| Merton | 219,608 |
| Maidstone | 193,470 |
| Mid Sussex | 165,560 |
| Middlesbrough | 160,100 |
| Mansfield | 114,428 |
| Mid Suffolk | 113,638 |
| Midlothian | 102,684 |
| Monmouthshire | 95,624 |
| Moray | 95,057 |
| Mole Valley | 88,989 |
| Mid Devon | 86,345 |
| Malvern Hills | 84,918 |
| Maldon | 70,623 |
| Merthyr Tydfil | 58,983 |
| Melton | 54,752 |