CJ
- BA CityFlyer
- C. J. (given name)
- CJ Affiliate
- CJ CheilJedang
- CJ Group
- Cangjie (disambiguation)
- Cangjie input method
- Carl Johnson (Grand Theft Auto)
- Centijoule
- Cessna CitationJet
- Chemins de fer du Jura
- Chief Justice
- China Northern Airlines
- ChinaJoy
- Cianjur railway station
- Congregation of Jesus
- Creutzfeldt–Jakob disease
- Criminal justice
- Ford FE engine
- Jeep CJ
- The Classical Journal
- The Courier-Journal
- Vehicle registration plates of Romania