Ulugh Muhammad or Muhammad Khan (1405–1445; Chagatai, Volga Türki, and Persian: الغ محمد; Kypchak: محمد خان; written as Ulanus by orientalists) was a medieval Tatar statesman, Gengisid, Khan of the Golden Horde (before 1436), ruler of Crimea (1437), and the founder of the Khanate of Kazan, which he ruled from 1438–1445.

He succeeded in spreading the power of the Horde to Crimea and established friendly relations with the Ottoman Sultan Murad II.

In 1431 the son and grandson of the ruler of Moscow, Dmitriy Donskoy came to the court to Ulugh Muhammad in order to reach a decision about princely succession.

While Dawlat remained in Crimea, Ulugh Muhammad fled to the Grand Duchy of Lithuania and pled for assistance from Vytautas the Great.

After regaining control over the Khanate, Ulugh Muhammad marched on Crimea, where Dawlat Berdi had re-established himself following Baraq's defeat and death.

In 1437 Vasili II of Moscow sent a large army against Ulugh Muhammad under the command of Dmitry Shemyaka, but they were defeated at the Battle of Belyov.