M
- (Roscommon) Moor
- (Roscommon) Moneen
- (Mayo County) Midfield
- (County Galway) Menlough
- (Mayo County) Meelick
- (County Galway) Meelick
- (Mayo County) Mayo
- (County Galway) Maum West
- (County Galway) Maum East
- (County Galway) Maum
- (County Galway) Mason Island
- (Mayo County) Maryland
- (Mayo County) Manulla
- (Mayo County) Mallaranny
- (County Galway) Maam Cross
- (County Galway) Muskerry Island
- (County Galway) Mullaghglass
- (County Leitrim) Mullanadarragh
- (Roscommon) Mullaun
- (Roscommon) Mountallen
- (Roscommon) Moyoran
- (Sligo) Mullaghroe
- (Sligo) Mahanagh
- (Sligo) Moylough
- (Sligo) Meenaglagh
- (Sligo) Masshill
- (Sligo) Mullany’s Cross
- (Sligo) Metal Bridge
- (Sligo) Mullaghanarry
- (Sligo) Muck Island