Other Uses
- Black jack (fish), a gamefish
- Blackjack (Transformers), a fictional character in the Transformers universe
- Black Jack, Missouri, United States
- Blackjack Pizza, a chain of pizza delivery restaurants in Colorado
- Blackjack Oak or Quercus marilandica, a small tree
- The Blackjacks, a professional wrestling tag team
- "Black Jack", a short story by Rudyard Kipling in the collection Soldiers Three
- Sphalerite, a mineral sometimes called black-jack by miners
- Blackjack (Atari 2600 video game), a video game cartridge developed by Atari
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