Jack Dempsey (1895–1983) was a heavyweight boxing champion.
Jack Dempsey may also refer to:
Sports Jack Dempsey (wrestler) (1920–2007), British wrestler Jack "Nonpareil" Dempsey (1862–1896), Irish-born middleweight boxing champion Jack Dempsey (Australian footballer) (1919–2006), Australian rules footballer Jack Dempsey (American football) (1913–1988), American football tackle Jack Dempsey (rugby union) (born 1994), Australian-Scottish rugby player Jack Dempsey (Gaelic footballer) (1878–1913), Irish Gaelic footballer Jack Dempsey (rugby league) (1907–1951), Australian rugby league player
Other uses Jack Frost (musician) (born 1968), American guitarist, born Jack Dempsey Ken Goldstein (born 1969), Jack Dempsey, American filmmaker, occasional actor and musician Jack Dempsey (politician) (born 1966), Australian politician Jack Dempsey (fish), a species of cichlid
See also Jack Dempsey's Broadway Restaurant, New York City restaurant John Dempsey (disambiguation)