| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Masiness | city | Donegal | Ireland | 55.13 | -7.91 | 124 | 1498 |
| Massbrook | city | Mayo | Ireland | 53.99 | -9.28 | 164 | 882 |
| Massbrook Lower | city | Mayo | Ireland | 53.99 | -9.28 | 164 | 882 |
| Massbrook South | city | Mayo | Ireland | 53.98 | -9.28 | 314 | 806 |
| Massbrook Upper | city | Mayo | Ireland | 53.98 | -9.29 | 272 | 752 |
| Massford Bridge | city | Kilkenny | Ireland | 52.84 | -7.17 | 830 | 3201 |
| Masshill | city | Sligo | Ireland | 54.10 | -8.86 | 830 | 366 |
| Massy's Bridge | city | Ireland | 52.63 | -8.75 | 42 | 6762 | |
| Massytown | city | Cork | Ireland | 51.90 | -8.97 | 291 | 4310 |
| Massy’s Bridge | city | Ireland | 52.63 | -8.75 | 42 | 6762 | |
| Mastergeehy | city | Kerry | Ireland | 51.89 | -10.10 | 288 | 478 |
| Masterstown | city | Ireland | 52.44 | -7.94 | 249 | 2212 |