BJ
- .bj
- B. J. (given name)
- B. J. Hunnicutt
- B. J. Jones
- B. J. Medical College, Pune
- B. J. and the Bear
- B.J. Walker
- BJ Birdie
- BJ Services Company
- BJ Smith
- BJ's Wholesale Club
- Bachelor of Journalism
- Ball joint
- Beijing
- Beijing (locomotive)
- Beitar Jerusalem F.C.
- Benin
- Bergslagernas Järnvägar
- Billy Joel
- Biochemical Journal
- Bj league
- Blackjack
- Booster Juice
- Boris Johnson
- Brandon Johnson
- Broadcast jockey
- Burton Joyce
- List of Canon products
- Nouvelair
- Official (American football)
- Toronto Blue Jays
- William "B.J." Blazkowicz