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

This page lists people with the surname Fahy.
If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link.