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 1984), known professionally as Sjava, is a South African singer, rapper, and actor.
Sjumandjaja (Perfected Spelling: Syumanjaya; 5 August 1934 – 19 July 1985) was an Indonesian director, screenwriter, and actor.
Sjung (Swedish: [¹ɧɵŋː], "Sing") is the fourth studio album by the Swedish singer-songwriter Laleh, released on 25 January 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.
Sigurjón Birgir Sigurðsson (born 27 August 1962), known as Sjón ( SYOHN), is an Icelandic poet, novelist, and lyricist.