M
- (Kilkenny) Mullinavat
- (County Carlow) Myshall
- (Uíbh Fhailí) Moneygall
- (Wexford) Murntown
- (Kildare) Milltown
- (Westmeath) Multyfarnham
- (Wicklow) Mucklagh
- (Uíbh Fhailí) Mucklagh
- (Kilkenny) Mooncoin
- (Kildare) Moone
- (Laois) Mountrath
- (Westmeath) Moate
- (Westmeath) Moate
- (Laois) Mountmellick
- (Fingal County) Mulhurddart
- (Kildare) Monasterevin
- (Dún Laoghaire-Rathdown) Monkstown
- (Kildare) Maynooth
- (Fingal County) Malahide