Malachy is a given name.
Notable bearers of the name include:
St. Malachy (1095-1148), Archbishop of Armagh and first native-born Irish saintMáel Sechnaill mac Máele Ruanaid, 9th-century High King of Ireland, also known as Malachy IMáel Sechnaill mac Domnaill, High King of Ireland in the late 10th and early 11th centuries, also known as Malachy IIMalachy McCourt (born 1931), Irish-American actor, writer and politicianMalachy Fisher, fictional character from the British soap opera HollyoaksPalacegarden Malachy, winner of the 2012 Westminster Kennel Club Dog Show