SJ or S.J. may refer to:
Sjögren syndrome (SjS, SS) is a long-term autoimmune disease that affects the body's moisture-producing glands.
Jabulani Hadebe (born 25 December 1984), better known by his stage name Sjava is a South African award-winning recording artist and actor from Johannesburg, South Africa.
Sjumandjaja (Perfected Spelling: Syumanjaya; 5 August 1934 – 19 July 1985) was an Indonesian director, screenwriter, and actor.
Sjung (Swedish: [ˈɧɵŋː], "Sing") is the fourth studio album by the Swedish singer-songwriter Laleh, released on January 25, 2012. Produced by Laleh herself, the album was released on Warner Music Sweden and Lost Army.
Scott Jablonski (known by his stage name SJ) is an American singer-songwriter, performing artist, and attorney based in South Florida.
Sjeng Schalken (Dutch pronunciation: [ʃɛŋ ˈsxɑɫkə(n)]) (born 8 September 1976) is a former professional tennis player from the Netherlands.