The Buyid dynasty or the Buyids, also known as Buwaihids, Bowayhids, Buyahids, or Buyyids, are a Shī‘ah dynasty of Daylimite or Kurdish origin from Daylaman in Gilan.

They establish a confederation that controls most of modern-day Iran and Iraq in the tenth and eleventh centuries.

During the tenth and eleventh centuries, just prior to the invasion of the Seljuq Turks, the Buyids are the most influential dynasty in the Middle East.