Mullin is a surname of Irish origin, and may refer to
Chris Mullin (b. 1963), American basketball player
Chris Mullin (politician), British Labour Party Member of Parliament
George Mullin (baseball) (1880-1944), baseball pitcher
George Mullin (VC) (1892-1963), American recipient of the Victoria Cross during World War I
Herbert Mullin, American serial killer
Hugh P. Mullin, Philippine-American War Medal of Honor recipient
Jack Mullin
Joseph Mullin (1811–1882), New York lawyer and politician
Mike Mullin
Willard Mullin
Glenn Mullin, author
