- Maam Cross
- Mace
- Mace Lower
- Mace Middle
- Mace North
- Mace South
- Mace Upper
- Maghera
- Maghera
- Magheraboy
- Magheraboy
- Magheraboy
- Magheraboy
- Magherafadda
- Magheraghanrush
- Magheralackagh
- Magheramore
- Magheramore
- Magheranagay
- Magheranore
- Maguins Island
- Magurk
- Mahanagh
- Mahanagh
- Mainistir
- Malivey
- Mallaranny
- Mannin
- Manninard
- Manorhamilton