Qasím Khan (Volga Türki and Persian: قاسم خان; also known as Qasim of Kasimov; died 1469) was the first khan of the Tatar Qasim Khanate, from 1452[1] until his death in 1469.
After the battle of Suzdal, he and his brother Yaqub were sent to Moscow to control the results of the treaty.
He stayed at the palace of Vasily II of Moscow to serve him; when his father died in 1445, the throne of Kazan went to his elder brother Mäxmüd, which may have something to do with his decision to enter Russian service.
In 1449, at the Pakhra River near Moscow, he defeated the troops of Sayid Ahmad I, the khan of the Great Horde, that came to conquer Muscovy.
In 1452, Vasily II granted him a principality in Ryazan, in the territory formerly belonging to Mishar Yurt, as a hereditary estate, and Kasimov city.