Michael Hammer

Michael Hammer or Mike Hammer may refer to:
 * Michael Armand Hammer (1955–2022), American philanthropist and businessman
 * Michael Martin Hammer (1948–2008), engineer and author
 * Mike Hammer (character), a fictional hard boiled detective
 * Mickey Spillane's Mike Hammer (1958 TV series)
 * Mickey Spillane's Mike Hammer (1984 TV series)
 * Mike Hammer (diplomat) (born 1963), official in the U.S. State Department