Macfinn Lower,
Macfinn Upper,
Maddykeel Lower,
Maghaberry,
Magherabeg,
Magheraboy,
Magheraboy or Bushmills,
Magheraboy Lower,
Magheracashel,
Magheracross,
Magheragall,
Magherahoney,
Magheralane,
Magheralave,
Magheraliskmisk,
Magheramenagh,
Magheramesk,
Magheramore,
Magheramully,
Magheramurphy,
Maghereagh,
Maghereeroy,
Magherindonnel,
Magherintendry,
Maghernahar,
Mallendober,
Malone Upper,
Manister,
Manola Wood,
Martinstown,
Maxwells Walls,
Mazes,
McVickersland,
Meadow Parks,
Middle Gortnagross,
Middle Park,
Midge Island,
Mill Five Acres,
Millquarter,
Mill Tenement,
Minnis North,
Minnis South,
Mistyburn,
Moboy,
Monaghan,
Monanclogh,
Moneybroom,
Moneycanon,
Moneycrumog,
Moneydollog,
Moneyduff,
Moneyglass,
Moneygobbin,
Moneyleck,
Moneyneagh,
Moneynick,
Moneyrod,
Moneyvart,
Monkstown,
Montiaghs,
Moordyke,
Moore Lodge,
Moss-Side (Kilbride parish),
Moss-Side (Grange of Drumtullagh parish),
Mostragee,
Mount Edwards,
Mount Hamilton,
Mount Shalgus,
Moyadam,
Moyarget Lower,
Moyasset,
Moyaver Lower,
Moycraig Macallister,
Moygarriff,
Moylarg,
Moylinny,
Moyrusk,
Muckamore,
Muckleramer,
Muckrim,
Mullaghboy,
Mullaghbui,
Mullaghcarton,
Mullaghconnelly,
Mullaghdoo, Mullaghduff,
Mullaghduff Big,
Mullaghgaun,
Mullaghglass,
Mullaghmossan,
Mullaghsandall,
Mullans,
Mullarts,
Mullinaskeagh,
Mullindress,
Mullinsallagh,
Munie North,
Murroo or Gortnagross Lower ==N==