Jack
- Almaco jack
- Amberjack
- Bar jack
- Black jack (fish)
- Bone Orchard
- Boot jack
- Carangidae
- Coho salmon
- Cracker Jack
- Crevalle jack
- Electrical connector
- Esox
- Giant trevally
- Hijacking (disambiguation)
- Horror Show (album)
- J.A.C.K.
- JACK Audio Connection Kit
- JACK Intelligent Agents
- Jack (1925 film)
- Jack (1996 film)
- Jack (2004 film)
- Jack (2013 film)
- Jack (2014 film)
- Jack (2015 film)
- Jack (2025 film)
- Jack (CAD software)
- Jack (Daudet novel)
- Jack (EP)
- Jack (Homes novel)
- Jack (Italian magazine)
- Jack (Lundell novel)
- Jack (Robinson novel)
- Jack (TV series)
- Jack (Tekken)
- Jack (album)
- Jack (baboon)
- Jack (band)
- Jack (cat)
- Jack (device)
- Jack (flag)
- Jack (given name)
- Jack (hero)
- Jack (human modeling)
- Jack (magazine)
- Jack (playing card)
- Jack (singer)
- Jack (song)
- Jack (surname)
- Jack (tree)
- Jack Box
- Jack County, Texas
- Jack Daniel's
- Jack FM
- Jack TV
- Jack Tar
- Jack mackerel
- Jack of plate
- Jack pine
- Jack plane
- Jack the Ripper
- Jack's (store)
- Jack, Alabama
- Jack, Missouri
- Jackfruit
- Jacking (dance)
- Jacks (disambiguation)
- Jacks (game)
- Jackscrew
- Leather jack
- Machinations (band)
- Mighty Gabby
- Mitsubishi J2M
- Monterey Jack
- New Jack
- Pallet jack
- Phone connector (audio)
- Quarter-jack
- Registered jack
- Roasting jack
- Spring-heeled Jack
- Strand jack
- T.N.T. (album)
- Turn It Up (Pixie Lott album)
- Union Jack
- Wolfman Jack
- Yellow jack
- Yukon Jack (liqueur)