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 Mick Moriarty, Australian musician Mike Moriarty (born 1974), baseball player Mícheál Ó Muircheartaigh (born 1930), Irish broadcaster, born Michael Moriarty