MJ may refer to:

Fictional characters

  • M.J. Delfino, in Desperate Housewives
  • Mary Jane Watson, in Marvel comics
  • Mary Jane Watson (2002 film series character), the film adaptation of the character
  • MJ (Marvel Cinematic Universe), a character in the Marvel Cinematic Universe
  • Agent MJ, in the film Miss Cast Away and the Island Girls, played by Michael Jackson
  • Agent M, in the film Men in Black II, played by Michael Jackson

People

  • MJ (South Korean singer) (Kim Myung-jun, born 1994), a South Korean singer, actor, and model
  • MJ Acosta (fl. from 2016), a Dominican-American sports reporter
  • MJ Cole (born 1973), English DJ and record producer
  • MJ Delaney, British television director
  • MJ Erb (born 1994), American long-distance runner
  • MJ Hegar (born 1976), American U.S. Air Force veteran and former political candidate
  • MJ Hibbett (born 1970), English guitarist singer-songwriter
  • Mary Jean "MJ" Lastimosa (born 1987), Filipina actress and beauty pageant titleholder
  • MJ Lee (born 1987), American political correspondent
  • MJ Lenderman (born 1999), American musician
  • MJ Long (1939–2018), American architect, lecturer and author
  • MJ Mentz (born 1982), South African rugby player
  • MJ Pelser (born 1998), South African rugby player
  • Mj Rodriguez (born 1991), American actress and singer
  • Mary Joy "MJ" Tabal (born 1989), Filipina marathon runner
  • MJ Williams (born 1995), Welsh footballer
  • Mahan Mj (born 1968), Indian mathematician and monk
  • Michael Jackson (1958–2009), American singer, songwriter, and dancer
  • MJ the Musical, a 2021 Broadway musical centered on Michael Jackson
  • MJ (album), the cast album to the musical
  • Michael Jordan (born 1963), American businessman and former professional basketball player
  • Mike Johnson (born 1972), Speaker of the United States House of Representatives since 2023

Science

  • Megajoule (MJ), or millijoule (mJ), units of energy <!--ignore one blue link rule-->
  • Jupiter mass (M<sub>J</sub>), a unit of mass

Transportation

  • Manufacturers' Junction Railway, near Cicero, Illinois, U.S., reporting mark MJ
  • Líneas Aéreas Privadas Argentinas, a former Argentinian airline, IATA airline code MJ
  • Jeep Comanche, designated MJ, a pickup truck
  • MJ (New York City Subway service), a defunct subway service in New York City, US
  • Marwar Junction railway station (station code: MJ), Rajasthan, India

Other uses

  • The MJ, a short name for The Municipal Journal, a United Kingdom publication about local democracy and civic administration
  • Maillot jaune or yellow jersey, worn by the leader of the Tour de France cycling stage race
  • Master of Jurisprudence, a master's degree
  • West's Military Justice Reporter (cited as M.J.), official reporter of the U.S. Court of Appeals for the Armed Forces
  • Short for Mary Jane, slang for marijuana

See also

  • Emjay (born 1974), a Canadian Eurodance musician
  • Ɱ, the letter M with hook