Mike or Michael Regan may refer to: Mike Regan (baseball) (1887–1961), American Major League Baseball pitcher Mike Regan (lacrosse) (born 1978), American retired lacrosse player Mike Regan (politician) (born 1961), American politician in Pennsylvania Michael Regan (British Army officer) (born 1942), British Army officer Michael Regan (Australian politician) (born 1974), Australian politician Michael S. Regan (born 1976), American government official