Jack Gallagher

Jack Gallagher may refer to:
 * Jack Gallagher (comedian) (born 1953), American comedian, actor and writer
 * Jack Gallagher (composer) (born 1947), American composer and college professor
 * Jack Gallagher (historian) (1919–1980), British historian
 * Jack Gallagher (oilman) (1916–1998), Canadian oil and gas executive
 * Gentleman Jack Gallagher (born 1990), British professional wrestler
 * Jack Gallagher, character in And Millions Will Die