Jack Warner may refer to:

• Jack L. Warner (1892–1978), head of Warner Bros. studio
• Jack M. Warner (1916–1995), American film producer
• Jack Warner (actor) (1895–1981), British film and television actor

• Jack Warner (catcher) (1872–1943), American baseball catcher
• Jack Warner (pitcher) (born 1940), American baseball relief pitcher
• Jack Warner (third baseman) (1903–1986), American baseball third baseman
• Jack Warner (football executive) (born 1943), Trinidadian former football administrator and current politician
• Jack Warner (footballer, born 1911) (1911–1980), Welsh football player with Swansea Town, Manchester United and Oldham
• Jack Warner (footballer, born 1898) (1898–1950), English football inside forward, played for Man. City, Watford and Thames
• Jack Warner (footballer, born 1883) (1883–1948), English football full-back, played for Preston NE, Southampton and Portsmouth
• Jack Warner (sport shooter), British Olympic shooter

• Jack Warner, founder of the Westervelt Warner Museum of American Art

• Jackie Warner (disambiguation)
• John Warner (disambiguation)
• Warner (disambiguation)