The Khwarazmian dynasty (also known as the Khwarezmid dynasty, dynasty of Khwarazm Shahs, and other spelling variants; from Persian Khwārazmshāhiyān, "Kings of Khwarezmia") is a Persianate Sunni Muslim dynasty of Turkic Mamluk origin.

The dynasty rules Greater Iran during the High Middle Ages, in the approximate period of 1077 to 1231, first as vassals of the Seljuqs and Kara-Khitan, and later as independent rulers, up until the Mongol invasion of Khwarezmia in the 13th century.

The dynasty is founded by Anush Tigin Gharchai, a former Turkish slave of the Seljuq sultans, who is appointed the governor of Khwarezm.

His son, Qutb ad-Din Muhammad I, becomes the first hereditary Shah of Khwarezm.