Michael Cavanagh or Cavanaugh may refer to:
- Michael Cavanagh (judge) (born 1940), justice on the Michigan Supreme Court
- Michael Cavanagh (architect) (1860–1941), Australian architect
- Michael J. Cavanagh, American business executive
- Michael Cavanagh, drummer for King Gizzard & the Lizard Wizard
- Michael Cavanaugh (musician) (born 1972), musician and actor, notable from musical Movin' Out
- Michael Cavanaugh (actor) (born 1942), American television and film actor, notable for 24
- Mike Cavanaugh, American ice hockey coach and player