Fahy (surname)

Fahy is a surname derived from the Irish surname Ó Fathaigh. Alternative spellings include Fahie, Fahey and Fay.

People named Fahy include:
 * Anthony Dominic Fahy, (1805–1871), Irish Dominican priest and missionary
 * Charles Fahy (1892–1979), Solicitor General of the United States
 * Edward Francis Fahy (1922–2005), Irish physicist and administrator
 * Francis Arthur Fahy (1854–1935), Irish nationalist, songwriter and poet
 * Francis Patrick Fahy (1880–1953), Irish teacher, barrister, and Fianna Fáil politician
 * Greg Fahy, cryobiologist and biogerontologist
 * Jack Fahy, U.S. government official
 * Jim Fahy (1946–2022), Irish broadcaster, journalist and documentary-maker
 * John Fahy, Scottish football player
 * Meghann Fahy (born 1990), American actress and singer
 * Michael Fahy, Irish farmer and politician
 * Ollie Fahy (born 1975), Irish hurler
 * Pádraic Fahy (born 1948), Irish sportsperson
 * Patricia Fahy, American politician
 * Sir Peter Fahy (born 1959), British police officer
 * Shea Fahy (born 1962), Gaelic football player