BK
- B.K. Cannon
- BK (musician)
- BK Racing
- BK channel
- BK virus
- Banjo-Kazooie
- Bankruptcy
- Berkeley (disambiguation)
- Berkelium
- Biratnagar Kings
- Bordkanone
- Bosnia and Herzegovina
- Bradykinin
- Brahma Kumaris
- British Knights
- Brooklyn
- Brother's Keeper (software)
- Burger King
- Criminal Code of Lithuania
- Elektronika BK
- Federal Criminal Police Office (Austria)
- Okay Airways
- TU Delft Faculty of Architecture
- The Bank of New York Mellon