The Qalandariyyah (Arabic: قلندرية), Qalandaris, Qalandars or Kalandars are wandering ascetic Sufi dervishes. The term covers a variety of sects, not centrally organized and may not be connected to a specific tariqat. One was founded by Qalandar Yusuf al-Andalusi of Andalusia, Spain. They were mostly in Iran, Central Asia, India and Pakistan.

Starting in the early 12th century, the movement gained popularity in Greater Khorasan and neighbouring regions, including South Asia. The first references are found in the 11th-century prose text Qalandarname (The Tale of the Kalandar) attributed to Ansarī Harawī. The term Qalandariyyat (the Qalandar condition) appears to be first applied by Sanai Ghaznavi (died 1131) in seminal poetic works where diverse practices are described. Particular to the qalandar genre of poetry are terms that refer to gambling, games, intoxicants and Nazar ila'l-murd, themes commonly referred to as kufriyyat or kharabat. The genre was further developed by poets such as Fakhr-al-Din Iraqi and Farid al-Din Attar.