SJB may refer to: Hochkirchliche St.-Johannes-Bruderschaft, a German High Church Lutheran religious society Sajau Basap language's ISO code San Joaquín Airport's IATA code
In schools: St. Jean de Brebeuf Catholic High School, Woodbridge, Ontario, Canada St. Jean de Brebeuf Secondary School, Hamilton, Ontario, Canada St John the Baptist School, Woking, Surrey, England, United Kingdom St. John The Baptist School (Alden, New York), United States St. John the Baptist Diocesan High School, West Islip, New York, United States St John Bosco Arts College, Liverpool, England
Automotive: Smart Junction Box, a junction box, usually with microcontroller, for addition functions
Other: Samagi Jana Balawegaya, Sri Lankan political party
See also Saint-Jean-Baptiste Society or SSJB