SJ may refer to:
Freedom Air (IATA code: SJ), a low cost New Zealand-based airline.
San Jose, a city in central California, United States.
Scarlett Johansson, an American actress.
SJ AB (Swedish Railways), a public transport limited company owned by the Swedish government formed from the old Statens Järnvägar.
Statens Järnvägar (English: Swedish State Railways), a former Swedish government agency that disbanded in 2001.
Society of Jesus (Latin: Societas Iesu), a Catholic religious order. Jesuits will sometimes put the letters "S.J." after their names to indicate membership.
St. John's Jesuit High School and Academy, a college-prep high school and Academy (junior high) in Toledo, Ohio.
St. John's Jesuit High SchoolSt. John's Jesuit AcademyStrafe-jumping, a trickjumping technique.
Subang Jaya, a residential hub in Klang Valley, Malaysia
SuperJet, a personal water craft produced by Yamaha Motors.
Super Junior, a K-Pop boyband under the SM Entertainment label.
Suzuki SJ 410 or 413, a series of four-wheel drive vehicles made by Suzuki.
Svalbard and Jan Mayen (ISO 3166-1 country code: SJ), two northern territories of Norway.
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