- Manseltown
- Mantlehill
- Mardyke
- Mariner's Row
- Markhamstown
- Marshalstown
- Marston
- Martara
- Martfield
- Martinstown
- Martrybeg
- Mary Fort
- Mary Ville
- Mary Ville
- Mary Ville
- Massy’s Bridge
- Massytown
- Mastergeehy
- Masterstown
- Matehy
- Mattle Island
- Maudemount Cross Roads
- Maugha
- Mauladinna
- Maulagallane
- Maulagow
- Maulahe
- Maulanimirish
- Maulatanrally
- Maulatrahane