- Mahon
- Mackey’s Cross
- Macroney
- Madore
- Mall Cross Roads
- Manch Bridge
- Mannin Island
- Manning
- Mannion’s Island
- Mariner's Row
- Marshalstown
- Marston
- Mary Ville
- Massytown
- Matehy
- Maugha
- Mauladinna
- Maulagow
- Maulahe
- Maulanimirish
- Maulatanrally
- Maulatrahane
- Maulavanig
- Maulawaddra
- Maulmane Bridge
- Maulyclickeen
- Maunvough
- Mayfield
- Meadstown
- Meelaherragh