| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Maelra | city | Ireland | 52.54 | -8.30 | 272 | 2315 | |
| Mahoonagh | city | Ireland | 52.43 | -9.01 | 213 | 5465 | |
| Mainistir na Féile | city | Ireland | 52.38 | -9.30 | 830 | 4187 | |
| Mantlehill | city | Ireland | 52.63 | -8.99 | 6 | 2175 | |
| Martinstown | city | Ireland | 52.40 | -8.50 | 364 | 2311 | |
| Mary Ville | city | Ireland | 52.55 | -8.65 | 177 | 2891 | |
| Massy's Bridge | city | Ireland | 52.63 | -8.75 | 42 | 6762 | |
| Massy’s Bridge | city | Ireland | 52.63 | -8.75 | 42 | 6762 | |
| Meanus | city | Ireland | 52.51 | -8.61 | 242 | 2009 | |
| Meelick Bridge | city | Ireland | 52.69 | -8.67 | 3 | 47333 | |
| Meenkilly | city | Ireland | 52.34 | -9.26 | 830 | 3390 | |
| Meenvline South | city | Ireland | 52.40 | -9.19 | 830 | 1840 | |
| Milltown | city | Ireland | 52.57 | -8.98 | 52 | 2438 | |
| Milltown Bridge | city | Ireland | 52.52 | -8.85 | 121 | 2231 | |
| Moanabricka | city | Ireland | 52.38 | -8.81 | 337 | 1998 | |
| Moanmore | city | Ireland | 52.29 | -8.50 | 830 | 1032 | |
| Moanroe | city | Ireland | 52.40 | -9.01 | 236 | 2195 | |
| Monabrack | city | Ireland | 52.34 | -8.20 | 1194 | 1196 | |
| Monaster | city | Ireland | 52.52 | -8.67 | 160 | 2262 | |
| Moneen | city | Ireland | 52.34 | -8.50 | 830 | 1534 | |
| Moneymohill | city | Ireland | 52.55 | -9.16 | 830 | 1584 | |
| Montpelic | city | Ireland | 52.75 | -8.49 | 170 | 4186 | |
| Moorestown | city | Ireland | 52.38 | -8.45 | 830 | 2191 | |
| Morenane | city | Ireland | 52.48 | -8.77 | 282 | 2116 | |
| Mornane | city | Ireland | 52.62 | -8.93 | 42 | 2225 | |
| Moroe | city | Ireland | 52.65 | -8.40 | 246 | 2482 | |
| Morreen | city | Ireland | 52.53 | -9.18 | 830 | 1440 | |
| Mortlestown | city | Ireland | 52.35 | -8.52 | 830 | 2024 | |
| Mountblakeney | city | Ireland | 52.38 | -8.65 | 229 | 4422 | |
| Mountcollins | city | Ireland | 52.32 | -9.23 | 830 | 1630 | |
| Muingacree | city | Ireland | 52.68 | -8.28 | 1066 | 1146 | |
| Mungairit | city | Ireland | 52.64 | -8.70 | 26 | 27761 | |
| Mungret | city | Ireland | 52.64 | -8.70 | 26 | 27761 | |
| Murrins Cross Roads | city | Ireland | 52.35 | -8.48 | 830 | 1853 |