| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Manorhamilton | city | County Leitrim | Ireland | 54.3063889 | -8.1761111 | 229 | 1377 |
| Maothail | city | County Leitrim | Ireland | 53.9166667 | -7.8666667 | 269 | 1394 |
| Mayo | city | County Leitrim | Ireland | 54.0513889 | -7.8536111 | 255 | 1458 |
| Meenkeeragh | city | County Leitrim | Ireland | 54.2730556 | -8.025 | 610 | 1698 |
| Meenymore | city | County Leitrim | Ireland | 54.2622222 | -8.1422222 | 908 | 1380 |
| Moher | city | County Leitrim | Ireland | 54.0669444 | -7.9738889 | 534 | 1387 |
| Mohill | city | County Leitrim | Ireland | 53.9166667 | -7.8666667 | 269 | 1394 |
| Morerah | city | County Leitrim | Ireland | 54.2894444 | -8.2808333 | 666 | 1380 |
| Mullaghboy | city | County Leitrim | Ireland | 54.088889 | -7.9666667 | 1282 | 1387 |
| Mullaghgarve | city | County Leitrim | Ireland | 54.0805556 | -7.9361111 | 547 | 1387 |
| Mullanadarragh | city | County Leitrim | Ireland | 53.9686111 | -7.6738889 | 291 | 1455 |
| Mullanyduffy | city | County Leitrim | Ireland | 54.3308333 | -8.1702778 | 492 | 1377 |
| Munnagashel | city | County Leitrim | Ireland | 54.2833333 | -8.1308333 | 534 | 1380 |
| Murhaun | city | County Leitrim | Ireland | 54.0641667 | -8.0286111 | 347 | 1429 |
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