- Macfinn Lower
- Macosquin
- Maddan
- Maghera
- Magheracreggan
- Magherafelt
- Magheragall
- Magheralane
- Magheralin
- Magheramorne
- Magherasaul
- Magheraveely
- Maghery
- Maguires Bridge
- Market Hill
- Mayobridge
- Meigh
- Mill Loughan
- Millford
- Millisle
- Moira
- Monea
- Moneydig
- Moneymore
- Moneyneany
- Moneyreagh
- Moorfields
- Moss-side
- Mount Hamilton
- Mount Norris
