The Principality of Khachen (Modern Armenian: ) was a medieval Armenian principality on the territory of historical Artsakh (present-day Karabakh). The provinces of Artsakh and Utik were attached to the Kingdom of Armenia in antiquity, although they were later lost to Caucasian Albania. In the early medieval period, these provinces were under Sassanid and then Arab suzerainty until the establishment of the Bagratid Kingdom of Armenia in the 9th century. From the 12th century, the principality of Khachen dominated the region.
All of the contemporary sources refer to the ruler of the principality an Armenian prince. In 1216, the Jalalyans founded the Gandzasar monastery which became the seat of the Armenian Apostolic Catholicos of Albania, forced to Khachen from Partav (Barda) by the steady Islamization of the city.