JMJ

JMJ may refer to:

• An abbreviation for the Holy Family (consisting of Jesus, Mary, and Joseph), printed by Christians on the top of letters and other places
• IATA code for Lancang Jingmai Airport
• Jam Master Jay (1965–2002), American musician and rapper
• Jam Master Jay Records, an American record label
• Jean-Michel Jarre (born 1948), French composer and producer
• Justin Meldal-Johnsen (born 1970), American musician
• World Youth Day (French: {{lang|fr|Journées Mondiales de la Jeunesse}}, Spanish {{lang|es|Jornada Mundial de la Juventud}}, Portuguese: {{lang|pt|Jornada Mundial da Juventude}})

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