Michael or Mike Harrison may refer to:
Arts and entertainment Michael Harrison (writer) (1907–1991), English detective fiction and fantasy author Michael Harrison (announcer) (fl. 1940s), British radio presenter M. John Harrison (born 1945), British science fiction author Mike Harrison (musician) (1945–2018), English musician Michael Harrison (musician), American composer and pianist Michael Allen Harrison, American New Age songwriter and pianist
Science and medicine Michael R. Harrison (born 1943), American pediatric surgeon J. Michael Harrison (born 1944), American operations research engineer Michael A. Harrison, American computer scientist
Sports Mike Harrison (footballer, born 1940) (1940–2019), English footballer Mick Harrison (rugby league) (1946–2025), English rugby league footballer Mike Harrison (footballer, born 1952), English footballer Mike Harrison (rugby union) (born 1956), English rugby union player Michael Harrison (cricketer) (born 1978), English cricketer
Others Michael Harrison (lawyer) (1823–1895), Irish lawyer and judge Michael Harrison (politician) (born 1958), American politician in Tennessee Mike Harrison (bishop) (born 1963), British Anglican bishop Michael S. Harrison (born 1968/1969), American police officer