CMJ was a music events/online media company which hosted an annual festival in New York City
CMJ may also refer to: Central Motorway Junction, motorway interchange in Auckland, New Zealand Christopher Martin-Jenkins (1945–2013), English cricket journalist and broadcaster Church's Ministry Among Jewish People, an Anglican church organisation CMJ University, Chandra Mohan Jha University, India College Mathematics Journal, a journal of the Mathematical Association of America Computer Music Journal, quarterly academic journal covering digital audio signal processing and electroacoustic music The Cormac McCarthy Journal, an academic journal dedicated to the works of American author Cormac McCarthy Qimei Airport (IATA airport code), Cimei, Penghu, Taiwan CMJ ammo, full metal jacket ammunition with cupronickel jacket