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 2 December 1988), better known by his stage name Sjava is a South African award winning recording artist from Johannesburg, South Africa.
Sjumandjaja (Perfected Spelling: Syumanjaya; 5 August 1934 – 19 July 1985) was an Indonesian director, screenwriter, and actor.
SJ (born Scott Jablonski in 1977) is an American singer-songwriter, performing artist, and attorney from South Florida.
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.
Sigurjón Birgir Sigurðsson (born 27 August 1962), known as Sjón ( SYOHN), is an Icelandic poet, novelist, and lyricist.