XJ

XJ may refer to:


 * Mesaba Airlines (IATA airline code XJ, 1974-2012)
 * Thai AirAsia X (IATA airline code XJ since 2014)
 * Jaguar XJ, a car series made by Jaguar
 * XJ music, a collaborative instrument for ambient music production
 * Jeep Cherokee (XJ), an internal vehicle code used by Jeep
 * Yamaha XJ650 Maxim, a motorcycle series made by Yamaha
 * Xinjiang, an autonomous region of China (Guobiao abbreviation XJ)