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)

This disambiguation page lists articles associated with the title XJ.
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