DJJ may refer to:
Dortheys Hiyo Eluay International Airport (IATA airport code DJJ), Jayapura, Papua, Indonesia Ndjébbana language (ISO 639 language code djj) Department of Juvenile Justice (disambiguation) Dunakeszi Jármű Javító, a hungarian rolling stock manufacturer
See also
China Railway DJJ1, a high-speed electric multiple unit train class
DJ (disambiguation) DDJ (disambiguation) JJD JDD (disambiguation)