John Moriarty may refer to:
John Moriarty (Attorney General) (1855–1915), Irish lawyer and judge John Moriarty (conductor) (1930–2022), American conductor and stage director John Moriarty (writer) (1938–2007), Irish writer and philosopher John Kundereri Moriarty (born 1938), Australian footballer and artist
See also Geoffrey John Jack Moriarty (1901–1980), Australian rules player Johnny Moriarty (born 1945), Irish retired hurling goalkeeper