"Jack the Giant Killer" is a Cornish fairy tale and legend.

Jack the Giant Killer may also refer to:

Film Jack the Giant Killer (1922 film), an American animated fantasy short film by Laugh-O-Gram Studio Jack the Giant Killer (1962 film), an American heroic fantasy adventure film Jack the Giant Slayer, originally titled Jack the Giant Killer, a 2013 American film Jack the Giant Killer (2013 film), an American fantasy film

Other uses Jack, the Giant Killer (novel), a 1987 novel by Charles de Lint Jack the Giantkiller, a 1982 video game

See also Giant-killing (disambiguation) Jack and the Beanstalk (disambiguation) Johnny the Giant Killer, a 1950 French animated film