CJ may stand for:

• Cayman Islands
• Civilian Jeep
• Chief Justice
• Cobra Jet (engine)
• The Courier-Journal, a newspaper in Louisville, Kentucky
• Commission Junction (cj.com)
• Contact juggling
• Criminal justice
• Josephite Fathers
• Topeka Capital-Journal
• Cheryl Johnson , a gossip columnist with the Minneapolis Star Tribune
• CJ Corporation (a.k.a Cheil Jedang), a South Korean corporation
• C.J. Cregg, fictional character on television show The West Wing