Fahey is a surname. Notable people with the surname include:
Brandon Fahey, American baseball player
Brian Fahey (composer), British musical director
Brian Fahey (ice hockey), American ice hockey player
David M. Fahey, American professor of history
Denis Fahey, Catholic priest
Frank Fahey, Irish politician
James Charles Fahey (1903–1974), American author and publisher
Jeff Fahey, American actor
John Fahey (musician), American guitarist and composer
John Fahey (politician), Australian politician
John M. Fahey, Jr., president and chief executive officer of the National Geographic Society
Joseph Fahey, American Roman Catholic theologian
Julie Fahey, American politician
Keith Fahey, an association football player for Birmingham City
Mary-Anne Fahey, Australian actor, comedian and writer
Mike Fahey, American mayor
Robert Fahey, Australian real tennis player
Siobhan Fahey (born 1958), Irish singer and musician
Terry Fahey, Australian rugby league footballer