| Place | State | Latitude | Longitude | Elevation (meters) | Elevation (feet) |
|---|
| Merston | NA | 50.8166667 | -0.7333333 | 5 | 16 |
| Merstone | NA | 50.6666667 | -1.25 | 34 | 112 |
| Merthyr | County of Carmarthenshire | 51.8630556 | -4.3961111 | 124 | 407 |
| Merthyr | Sir Gaerfyrddin | 51.8630556 | -4.3961111 | 124 | 407 |
| Merthyr Cynog | NA | 52.0166667 | -3.4833333 | 301 | 988 |
| Merthyr Mawr | Bwrdeistref Sirol Pen-y-bont ar Ogwr | 51.4861111 | -3.6086111 | 12 | 39 |
| Merthyr Mawr | County Borough of Bridgend | 51.4861111 | -3.6086111 | 12 | 39 |
| Merthyr Tudful | Bwrdeistref Sirol Merthyr Tudful | 51.75 | -3.3833333 | 178 | 584 |
| Merthyr Tudful | County Borough of Merthyr Tydfil | 51.75 | -3.3833333 | 178 | 584 |
| Merthyr Tudful | Bwrdeistref Sirol Merthyr Tudful | 51.75 | -3.3833333 | 178 | 584 |
| Merthyr Tudful | County Borough of Merthyr Tydfil | 51.75 | -3.3833333 | 178 | 584 |
| Merthyr Tydfil | Bwrdeistref Sirol Merthyr Tudful | 51.75 | -3.3833333 | 178 | 584 |
| Merthyr Tydfil | County Borough of Merthyr Tydfil | 51.75 | -3.3833333 | 178 | 584 |
| Merthyr Tydfil | Bwrdeistref Sirol Merthyr Tudful | 51.75 | -3.3833333 | 178 | 584 |
| Merthyr Tydfil | County Borough of Merthyr Tydfil | 51.75 | -3.3833333 | 178 | 584 |
| Merton | County of Norfolk | 52.55 | 0.8166667 | 50 | 164 |
| Merton | NA | 50.8833333 | -4.1 | 58 | 190 |
| Merton | NA | 51.85 | -1.1666667 | 60 | 197 |
| Meshaw | NA | 50.9666667 | -3.7666667 | 165 | 541 |
| Messing | NA | 51.8333333 | 0.75 | 59 | 194 |
