- Moville
- Moy Bridge
- Moyagh
- Moyle
- Moylemuck
- Moyles
- Moyles
- Moyne Bridge
- Moyra
- Muckros
- Muff
- Muineagh
- Mullabryan
- Mullagh
- Mullagharry
- Mullaghnadreesruhan
- Mullaghoran
- Mullaloughan
- Mullan
- Mullan
- Mullanacross
- Mullanacross
- Mullanasole
- Mullanmore
- Mullenieran Bridge
- Mullingar
- Mully
- Mulnamin
- Muntermellan
- Murlas Bridge