- Macroom
- Mallow
- Mackey’s Cross
- Mackney
- Macroney
- Madman’s Seat
- Madore
- Maelra
- Maghanknockane
- Maghanlawaun
- Maghera
- Maghera Cross
- Magherabaun
- Magowha
- Magowry
- Maharees
- Mahon
- Mahon Bridge
- Mahonburgh Bridge
- Mahoonagh
- Maidens Island
- Maine Bridge
- Maingailaunlush
- Mall
- Mall Cross Roads
- Manch Bridge
- Mangerton
- Mannin Island
- Manning
- Mannion’s Island