Malachy ( ) is a given name of Irish origin. Notable people with the name include:
People Saint Malachy (1095–1148), Archbishop of Armagh and first native-born Irish saint Malachy of Ireland (fl. 1279–1300), theologian and archbishop Máel Sechnaill mac Máele Ruanaid, 9th-century High King of Ireland, also known as Malachy I Máel Sechnaill mac Domnaill, High King of Ireland in the late 10th and early 11th centuries, also known as Malachy II Malachy Carey (1956–1992), Irish republican Malachy Coney, Northern Irish comics writer and cartoonist Malachy Conlon (d. 1950), Northern Irish politician Malachy Bowes Daly (1836–1920), Canadian politician Malachy John Goltok (1965–2015), Nigerian Catholic bishop Malachy Higgins (born 1944), Northern Irish Lord Justice of Appeal Malachy Hitchins (1741–1809), Cornish astronomer and cleric Malachy Kilbride, Irish-American activist Malachy "Mal" Loye, English cricket player Malachy E. Mannion (born 1953), American judge Malachy McCourt (1931–2024), Irish-American actor, writer and politician Malachy McGurran (1938–1978), Irish republican Malachy Ó Caollaidhe (d. 1645), Irish Catholic archbishop Malachy Ikechukwu Okwueze (born 1962), Nigerian professor of religion and ethics Malachy O'Rourke, Irish Gaelic footballer and manager Malachy Postlethwayt (1707–1767), British economist and lexicographer Malachy Salter (1715–1781), Nova Scotian merchant and office-holder convicted of sedition Malachy Sheridan (1966–2002), Irish bobsledder Malachy Sullivan (1893–1967), American Catholic priest, collegiate instructor, and football coach Malachy Tallack (born 1980), Shetland singer-songwriter, journalist and author Malachy Travers, Irish hurler
Fictional characters Malachy Costello, from the Irish soap opera Fair City Malachy Fisher, from the British soap opera Hollyoaks Malachy Malone, from the American soap opera Ryan's Hope
Dogs Palacegarden Malachy, winner of the 2012 Westminster Kennel Club Dog Show