M
- (Mayo County) Murneen South
- (Mayo County) Mace Upper
- (Mayo County) Mountain
- (Mayo County) Mountaincommon
- (Mayo County) Meellran
- (Mayo County) Mullenmadoge
- (Mayo County) Mannin
- (Mayo County) Magheraboy
- (Sligo) Montiagh
- (Sligo) Maghera
- (Sligo) Magheranore
- (Sligo) Mountirvine
- (Sligo) Maydough
- (Sligo) Moygara
- (Sligo) Monasterredan
- (Sligo) Monasteradon
- (Sligo) Mweelroe
- (Roscommon) Mullaghnashee
- (Roscommon) Mountain Lower
- (Roscommon) Meelick
- (Roscommon) Mullen
- (Sligo) Muckelty
- (Sligo) Masreagh
- (Sligo) Mullaroe
- (Sligo) Mullanashee Lugnadelle
- (Sligo) Moyrush
- (Sligo) Meelick Park
- (Sligo) Mullaghnabreena
- (Sligo) Mullagheor
- (Sligo) Maghera