MJ

MJ may refer to:

Fictional characters

 * M.J. Delfino, in Desperate Housewives
 * Mary Jane Watson, in Marvel comics
 * Mary Jane Watson (Sam Raimi film series), 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

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
 * MJ Lee (born 1987), American political correspondent
 * 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
 * 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 2022 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
 * Michael Jordan (born 1963), American businessman and former professional basketball player

Science

 * Megajoule (MJ), or millijoule (mJ), units of energy
 * Jupiter mass (MJ), 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

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