TJ may refer to:

Fictional characters

People

Places

Businesses and organizations

Schools

Other businesses and organizations

  • T.J.'s, a nightclub and live music venue in Newport, Wales
  • Trader Joe's, a chain of specialty grocery stores

Law

  • Therapeutic jurisprudence, the study of the effect that legal rules and procedures produce on individuals involved in legal processes
  • Tribunal de Justiça, or Court of Justice, the appellate courts of Brazil

Science and technology

  • .tj, the country code top level domain (ccTLD) for Tajikistan
  • Terajoule, a unit of energy equal to 1012 joules
  • Thermal Junction, or Junction temperature, in semiconductors
  • Tommy John surgery, a surgical procedure named after a former Major League Baseball pitcher

Other uses