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
  • JJ, the production code for the 1967 Doctor Who serial The Macra Terror

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
  • 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)