DDJ or variation, may refer to:

Law, justice, governance Deacons for Defense and Justice, an African-American self-defense group DDJ (Deputy District Judge) a judicial title in the judiciary of England and Wales a judicial title in the District Court (Hong Kong)

Data, computing, information science Dr. Dobb's Journal, a computer science and programming magazine and journal Data-driven journalism Data-dependent jitter

Other uses Djaru language (ISO 639 language code ddj) Dum Dum Junction railway station (station code DDJ), Dum Dum, West Bengal India; a train station Pioneer DDJ, a DJ controller series from Pioneer; see Pioneer DJ

See also

DDJ1, a high-speed electrical multiple unit train class for China Railways Plasmin (1DDJ), an enzyme

DJ (disambiguation) JDD (disambiguation) JJD DJJ (disambiguation)