BK may stand for:
Most commonly:
Others:- Banjo-Kazooie (video game)
- Bankruptcy
- Battery Captain (UK)
- Beekeeper
- Below knee (amputation)
- Berkelium
- Bible Knowledge
- Blitzkrieg (game)
- Book
- Bosnia and Herzegovina
- Brinkman-Kramers
- British Knights
- Brooklyn
- Bruel & Kjaer (bk.dk)
- Bundeskanzler (Germany)