Michael Moriarty (disambiguation)

Michael Moriarty (born 1941) is an American-Canadian actor.

Michael Moriarty is also the name of:
 * Michael Moriarty (judge) (born 1946), Irish judge who chaired the Moriarty Tribunal into payment to politicians Charles Haughey and Michael Lowry
 * Michael Moriarty (historian), British historian
 * Michael Moriarty (politician), South African politician from Gauteng
 * Michael Moriarty (author) (born 1954), General Secretary of Education and Training Boards Ireland
 * Michael Moriarty, bass guitarist for the band Hey Monday
 * Mick Moriarty, Australian musician
 * Mike Moriarty (born 1974), baseball player
 * Mícheál Ó Muircheartaigh (born 1930), Irish broadcaster, born Michael Moriarty