JCJ may refer to:
J. C. J. Kimaro, commander of the Kenyan Navy JCJ Architecture, formerly Jeter, Cook & Jepson, an architecture firm; see Foxwoods Resort Casino JCJ Vanderheyden (1928–2012), Dutch painter and photographer Jean-Claude Juncker (born 1954), Luxembourgish prime minister and president of the European Commission Journal of Criminal Justice, a bimonthly peer-reviewed academic journal