Jack Dempsey (1895–1983) was a heavyweight boxing champion.

Jack Dempsey may also refer to:

• 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

• Jack Frost (musician) (born 1968), American guitarist, born Jack Dempsey
• Ken Goldstein (born 1969), aka Jack Dempsey, American filmmaker, occasional actor and musician
• Jack Dempsey (politician) (born 1966), Australian politician
• Jack Dempsey (fish), a species of cichlid

• Jack Dempsey's Broadway Restaurant, New York City restaurant
• John Dempsey (disambiguation)

This disambiguation page lists articles associated with the title Jack Dempsey.
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