WJ

WJ may refer to:


 * Jeep Grand Cherokee (WJ), a generation of Jeep Grand Cherokee
 * Air Labrador, based in Canada (1948-2017, IATA code WJ)
 * West Jersey Railroad, a predecessor of the West Jersey and Seashore Railroad
 * WestJet airlines
 * Wiking-Jugend, a German Neo-Nazi organization
 * Woodcock–Johnson Tests of Cognitive Abilities, a set of intelligence tests
 * Word joiner, a Unicode character
 * Fighting World of Japan Pro Wrestling, also known as World Japan
 * Waylon Jennings (1937-2002), American musician