Michael, Mick or Mike Clifford may refer to:Michael Clifford (journalist), Irish author and journalist Michael Clifford (musician), Australian guitarist, bandmember of 5 Seconds of Summer Michael R. Clifford (1952–2021), American army officer and astronaut Michael B. Clifford, British filmmaker Michael K. Clifford, American education investor and advisor Mike Clifford, American singer Mick Clifford (1916–1942), Australian rugby union player