Macken, Macosquin, Madden, Maghaberry, Maghera, Magheraconluce, Magherafelt, Magheralin, Magheramason, Magheramorne, Magheraveely, Maghery, Maguiresbridge, Markethill, Martinstown, Maydown, Mayobridge, Mazetown, Meigh, Middletown, Milford, Millbank, Mill Bay, Millisle, Milltown (Co. Antrim), Moira, Monea, Moneyglass, Moneymore, Moneyneany, Moneyreagh, Moneyslane, Monteith, Moortown, Moss-Side, Mountfield, Mountjoy, Mounthill, Mountnorris, Moy, Moygashel, Mullaghbawn, Mullaghboy, Mullaghbrack, Mullaghglass, Mullavilly-Laurelvale