Qasr al-Azraq is a large fortress located in present-day eastern Jordan. It is one of the desert castles, located on the outskirts of present-day Azraq, roughly 100 km (62 mi) east of Amman.

The desert castles or qasrs are often called Umayyad desert castles, since the vast majority of these fortified palaces or castles were built by the Umayyad Dynasty in their province of Bilad ash-Sham, with very few Abbasid exceptions. The desert castles of Jordan represent a prominent part of this group of buildings, with most Umayyad "desert castles" being scattered over the semi-arid regions of north-eastern Jordan, with several more in Syria, Israel and the West Bank (Palestine), and just one Abbasid exception in Iraq.