| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Mace | city | Gaillimh | Ireland | 53.3944444 | -9.0241667 | 95 | 2592 |
| Magheramore | city | Gaillimh | Ireland | 53.4091667 | -9.3019444 | 187 | 2577 |
| Maigh Cuilinn | city | Gaillimh | Ireland | 53.3405556 | -9.2036111 | 259 | 2782 |
| Malivey | city | Gaillimh | Ireland | 53.3880556 | -9.9997222 | 9 | 1816 |
| Meelick | city | Gaillimh | Ireland | 53.1730556 | -8.0875 | 180 | 2744 |
| Meeneen | city | Gaillimh | Ireland | 53.1577778 | -8.1575 | 180 | 2753 |
| Menlough | city | Gaillimh | Ireland | 53.3025 | -9.0691667 | 29 | 1972 |
| Menlough | city | Gaillimh | Ireland | 53.4166667 | -8.5797222 | 249 | 2867 |
| Mionlach | city | Gaillimh | Ireland | 53.4166667 | -8.5797222 | 249 | 2867 |
| Mira | city | Gaillimh | Ireland | 53.3788889 | -8.81 | 200 | 2870 |
| Moat Bridge | city | Gaillimh | Ireland | 53.1416667 | -8.2858333 | 479 | 2880 |
| Moneen East | city | Gaillimh | Ireland | 53.1605556 | -8.745 | 193 | 2885 |
| Moneymore | city | Gaillimh | Ireland | 53.26 | -8.8825 | 29 | 2746 |
| Monivea | city | Gaillimh | Ireland | 53.3677778 | -8.6977778 | 249 | 2871 |
| Monroe | city | Gaillimh | Ireland | 53.3858333 | -8.9038889 | 88 | 2870 |
| Montiagh | city | Gaillimh | Ireland | 53.3475 | -8.9716667 | 29 | 2870 |
| Montpelier | city | Gaillimh | Ireland | 53.3311111 | -8.7177778 | 160 | 2874 |
| Moorfield Cross Roads | city | Gaillimh | Ireland | 53.1880556 | -8.195 | 246 | 2855 |
| Mount Bellew | city | Gaillimh | Ireland | 53.4666667 | -8.5 | 246 | 2864 |
| Mount Bellew Bridge | city | Gaillimh | Ireland | 53.4666667 | -8.5 | 246 | 2864 |
| Moy | city | Gaillimh | Ireland | 53.1205556 | -8.9605556 | 101 | 2562 |
| Moyard | city | Gaillimh | Ireland | 53.5441667 | -10.030556 | 239 | 1945 |
| Moycullen | city | Gaillimh | Ireland | 53.3405556 | -9.2036111 | 259 | 2782 |
| Moyrus | city | Gaillimh | Ireland | 53.34 | -9.8697222 | 75 | 1519 |
| Muckanagh | city | Gaillimh | Ireland | 53.1663889 | -8.1513889 | 190 | 2753 |
| Muckanaghkillew | city | Gaillimh | Ireland | 53.3430556 | -9.4630556 | 249 | 2871 |
| Muckrush | city | Gaillimh | Ireland | 53.3566667 | -9.0705556 | 65 | 1773 |
| Muine Mhea | city | Gaillimh | Ireland | 53.3677778 | -8.6977778 | 249 | 2871 |
| Muine Mheá | city | Gaillimh | Ireland | 53.3677778 | -8.6977778 | 249 | 2871 |
| Mullagh | city | Gaillimh | Ireland | 53.2175 | -8.4183333 | 249 | 2881 |
| Mullaghglass | city | Gaillimh | Ireland | 53.5963889 | -9.9275 | 232 | 1433 |
| Mulroog | city | Gaillimh | Ireland | 53.1816667 | -8.9377778 | 3 | 2090 |
| Murroogh | city | Gaillimh | Ireland | 53.1313889 | -9.2744444 | 341 | 938 |
| Murrough | city | Gaillimh | Ireland | 53.1313889 | -9.2744444 | 341 | 938 |
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