John Mack

John Mack may refer to:
 * John Martin Mack (1715–1784), Moravian bishop
 * John Mack (Serampore) (1797–1845), Baptist missionary in India
 * John Mack (Medal of Honor recipient) (1843–1881), American Civil War sailor and Medal of Honor recipient
 * John J. Mack (coach) (1870–1923), Yale University track coach
 * John Sephus Mack (1880–1940), president of the G. C. Murphy Company
 * John Mack (British politician) (1899–1957), Labour Member of Parliament for Newcastle-under-Lyme 1942–1951
 * John Mack (musician) (1927–2006), American oboist
 * John E. Mack (1929–2004), American psychiatrist known for his interest in alien abduction
 * John Givan Davis Mack (1867–1924), American engineer
 * John Mack (civic leader) (1937–2018), president of the Los Angeles Urban League
 * John J. Mack (born 1944), former CEO and chairman of the board of Morgan Stanley
 * John C. Mack (born 1976), American photographer
 * John L. Mack (fl. 1956–1993), American sound engineer
 * John E. Mack (bishop), bishop of the Polish National Catholic Church
 * John M. (Jack) Mack, one of the founding brothers of Mack Trucks
 * John Mack (anthropologist) (born 1949), British social anthropologist and art historian
 * John Mack (athletic director), director of athletics for Princeton University