| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Malahide | city | Baile Atha Cliath | Ireland | 53.4508333 | -6.1544444 | 3 | 68332 |
| Marino | city | Baile Atha Cliath | Ireland | 53.3666667 | -6.2333333 | 3 | 89847 |
| Marlfield | city | Baile Atha Cliath | Ireland | 53.2702778 | -6.3872222 | 531 | 96720 |
| Merrion | city | Baile Atha Cliath | Ireland | 53.295 | -6.2372222 | 242 | 88981 |
| Milltown | city | Baile Atha Cliath | Ireland | 53.3208333 | -6.4594444 | 259 | 84178 |
| Milltown | city | Baile Atha Cliath | Ireland | 53.31 | -6.2472222 | 144 | 88981 |
| Monkstown | city | Baile Atha Cliath | Ireland | 53.2888889 | -6.1452778 | 3 | 64370 |
| Mount Merrion | city | Baile Atha Cliath | Ireland | 53.295 | -6.2372222 | 242 | 88981 |
| Mountjoy | city | Baile Atha Cliath | Ireland | 53.35 | -6.25 | 3 | 89847 |
| Mountjoy Ward | city | Baile Atha Cliath | Ireland | 53.35 | -6.25 | 3 | 89847 |
| Mulhurddart | city | Baile Atha Cliath | Ireland | 53.4036111 | -6.4011111 | 118 | 84894 |
| Mullach Ide | city | Baile Atha Cliath | Ireland | 53.4508333 | -6.1544444 | 3 | 68332 |
| Mullach Íde | city | Baile Atha Cliath | Ireland | 53.4508333 | -6.1544444 | 3 | 68332 |
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