JJ or jj may refer to:
Arts and entertainment
Film and television J. J. Evans, a character in the 1970s sitcom Good Times Jennifer Jareau or JJ, a character in Criminal Minds John Diggle Jr., a character in Arrow nicknamed "J.J." JJ DiMeo, a character in Speechless Jean-Jacques Leroy, a character in Yuri on Ice JJ Jones (Skins), a character in the British teen drama Skins "JJ" (Skins series 3), an episode of Skins series 3 "JJ", an episode of Skins series 4 The Macra Terror, a 1967 Doctor Who serial (production code JJ) JJ Maybank, a character in the Netflix teen drama Outer Banks (TV series)
Music JJ (Swedish band) JJ, a band featuring English singer Jan Johnston J.J.!, an album by J. J. Johnson "J.J.", a song on the soundtrack of the video game L.A. Noire Abbreviation for Latin Jesu Juva, used by Johann Sebastian Bach at the beginning of his compositions
Other media JJ (magazine), a fashion magazine JJ (video game), a video game developed and published by Square Co., Ltd.
People
JJ (singer) (born 2001), Austrian singer and winner of the Eurovision Song Contest 2025 JJ Lin (born 1981), Singaporean artist JJ Cale (1938-2013), American guitarist, singer and songwriter J. J. Eubanks (born 1968), American basketball player JJ Galbreath (born 2001), American football player JJ Kaplan (born 1997), American-Israeli basketball player JJ Lehto (born Jyrki Juhani Järvilehto, 1966), Finnish motor racing driver J. J. McCarthy (born 2003), American football player J. J. Moser (born 2000), Swiss professional hockey player JJ Pegues (born 2001), American football player JJ Redick (born 1984), American basketball coach and player J.J. Roberts (American football) (born 2001), American football player J. J. Valberg (born 1936), British-American philosopher J. J. Webster (1898–1965), American politician
Other uses JJ, abbreviation for plural judges or justices JJ, a brassiere measurement in the UK Jj coupling, a form of angular momentum coupling JJ, IATA code for LATAM Brasil J/Z (New York City Subway service), formerly JJ , rapid trains on the Jōban Line in Japan Jilly Juice, a fermented drink and a form of alternative medicine John Jay Hall, a dormitory at Columbia University
See also Jay Jay the Jet Plane, a children's television cartoon series Jay Jay, a 2003 Tamil film Jay-J (born 1969), American house music disc jockey Double J (disambiguation) J & J (disambiguation) JJS (disambiguation) GG (disambiguation) JJJ (disambiguation)