Jack Harkness is a character played by John Barrowman in Doctor Who and Torchwood.
Jack Harkness may also refer to:
"Captain Jack Harkness" (Torchwood episode), an episode of Torchwood Jack Harkness, played by Matt Rippy, a minor Torchwood character Jack Harkness (footballer, born 1907) (1907–1985), Scottish footballer Jack Harkness (footballer, born 2004), Scottish footballer Jack Harkness (1918–1994), rose breeder with Harkness Roses
See also John Harkness (disambiguation)