John Hack

John Hack may refer to:

• John Hack (Medal of Honor) (1842–1933), soldier in the Union Army in the American Civil War
• John Hack (speedway rider) (born 1959), British motorcycle speedway rider
• John Tilton Hack (1913–1991), American geologist
• John Barton Hack (1805–1884), early settler in South Australia

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