Michael Cahill may refer to:
Michael P. Cahill (born 1961), American politician in Massachusetts Michael Cahill (Irish politician) Michael Cahill (New Hampshire politician) Michael T. Cahill, American law professor Mike Cahill (filmmaker) (born 1979), American filmmaker Mike Cahill (golfer), (born 1951), Australian golfer Michael Cahill (hurler) (born 1989), Irish hurler Mike Cahill (tennis) (born 1952), American tennis player