The Uyunid Emirate was a historical Arab emirate centered in al-Hasa that ruled over most of eastern Arabia and Najd. The Uyunid dynasty, which belonged to the Banu Abd al-Qays tribe, ruled the emirate from 1076 until it was overthrown by the Usfurids in 1238. The emirate was established after the Uyunids took control from the Qarmatians.

The Qarmatians were a militant Isma'ili Shia movement centred in al-Hasa in Eastern Arabia, where they established a religious—and, as some scholars have claimed, proto-socialist or utopian socialist—state in 899 CE. Its members were part of a movement that adhered to a syncretic branch of Sevener Ismaili Shia Islam, and were ruled by a dynasty founded by Abu Sa'id al-Jannabi, a Persian from Jannaba in coastal Fars. They rejected the claim of Fatimid Caliph Abdallah al-Mahdi Billah to imamate and clung to their belief in the coming of the Mahdi, and they revolted against the Fatimid and Abbasid Caliphates.