| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Maolan na nGabhar | city | Loch Garman | Ireland | 52.4266667 | -6.5388889 | 157 | 4035 |
| Maolán na nGabhar | city | Loch Garman | Ireland | 52.4266667 | -6.5388889 | 157 | 4035 |
| Marley Bridge | city | Loch Garman | Ireland | 52.5333333 | -6.6233333 | 232 | 4033 |
| Mayglass | city | Loch Garman | Ireland | 52.2419444 | -6.5061111 | 68 | 3465 |
| Mervyn | city | Loch Garman | Ireland | 52.2786111 | -6.4008333 | 3 | 2474 |
| Milehouse | city | Loch Garman | Ireland | 52.5169444 | -6.5930556 | 200 | 4033 |
| Millroad | city | Loch Garman | Ireland | 52.1847222 | -6.5591667 | 0 | 2230 |
| Milltown | city | Loch Garman | Ireland | 52.5866667 | -6.4738889 | 236 | 4026 |
| Mine Bridge | city | Loch Garman | Ireland | 52.6891667 | -6.4919444 | 337 | 4204 |
| Mocurry Bridge | city | Loch Garman | Ireland | 52.5619444 | -6.7233333 | 380 | 4037 |
| Mocurry Cross Roads | city | Loch Garman | Ireland | 52.5563889 | -6.7066667 | 377 | 4029 |
| Monale | city | Loch Garman | Ireland | 52.7683333 | -6.3275 | 610 | 4184 |
| Monamolin | city | Loch Garman | Ireland | 52.5555556 | -6.3438889 | 223 | 4029 |
| Monart | city | Loch Garman | Ireland | 52.5 | -6.6 | 187 | 4036 |
| Monaseed | city | Loch Garman | Ireland | 52.7216667 | -6.3916667 | 698 | 4096 |
| Mount George | city | Loch Garman | Ireland | 52.5761111 | -6.4233333 | 249 | 4029 |
| Mounthoward Cross Roads | city | Loch Garman | Ireland | 52.5761111 | -6.3658333 | 249 | 4029 |
| Muchwood Cross Roads | city | Loch Garman | Ireland | 52.3580556 | -6.5577778 | 157 | 4038 |
| Mullinderry Bridge | city | Loch Garman | Ireland | 52.2922222 | -6.8077778 | 78 | 4038 |
| Mulmontry Bridge | city | Loch Garman | Ireland | 52.3341667 | -6.6766667 | 196 | 4050 |
| Murntown | city | Loch Garman | Ireland | 52.2811111 | -6.52 | 190 | 4056 |
| Myaugh | city | Loch Garman | Ireland | 52.5558333 | -6.4758333 | 249 | 4029 |
| Mye Cross Roads | city | Loch Garman | Ireland | 52.4716667 | -6.5125 | 246 | 4036 |
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