PJ
- Air Saint-Pierre
- Bruno Wolkowitch
- Central Directorate of the Judicial Police
- JP (disambiguation)
- Justicialist Party
- Massie Wireless Station
- P. J. (given name)
- P.J. (Disney)
- P.J. (comics)
- P.J. (film)
- PJ (singer)
- PJ (song)
- PJ Media
- PJ Trailers
- PJS (disambiguation)
- Pajamas
- Peach John
- Personal jurisdiction
- Petajoule
- Petaling Jaya
- Picojoule
- Polícia Judiciária
- Port Jefferson, New York
- Port Jervis, New York
- The Pharmaceutical Journal
- United States Air Force Pararescue