CSJ may refer to:

• Campaign for Social Justice, a group which began campaigning for civil rights in Northern Ireland in 1964
• Centre for Social Justice
  • CSJ Alliance
  • CSJ Awards
• Chemical Society of Japan
• Congregation of the Sisters of Saint Joseph
• Cultic Studies Journal predecessor to the Cultic Studies Review
• Superior Council of the Judiciary of Colombia
• ICAO airline designator for Castle Aviation
• Jung Chan-Sung, a South Korean mixed martial artist

• National Lampoons Christmas Vacation
• National Lampoon's Disco Beaver from Outer Space
• National Lampoon's Electric Apricot: Quest for Festeroo
• National Lampoon's Family Vacation
• National Lampoon's Favorite Deadly Sins
• National Lampoon's Funny Money
• National Lampoon's Going the Distance
• National Lampoon's Golf Punks
• National Lampoon's Joy Of Sex
• National Lampoon's "Pledge This"
• National Lampoon's Pucked
• National Lampoons Senior Trip
• National Lampoon's series of "Vacation" films
• National Lampoon's Thanksgiving Family Reunion
• National Lampoon's The Stoned Age
• National Lampoons Vacation
• National Lampoon's Vacation (film series)
• National Lampoon’s Senior Trip
• National Lampoon’s Vacation
• National land and property gazetteer
• National Land Company
• National Landmark
• National Landmark of Soaring
• National Land Survey of Finland
• National Language