Almas Beg (died c. 1302), better known by his title Ulugh Khan, was a brother and a general of the Delhi Sultanate ruler Alauddin Khalji. He held the iqta' of Bayana in present-day India.
Ulugh Khan played an important role in Alauddin's ascension to the throne of Delhi in 1296. He lured the former Sultan Jalaluddin to Kara, where Alauddin assassinated Jalaluddin. He successfully besieged Multan, governed by Jalaluddin's eldest son Arkali Khan, and subjugated the surviving members of Jalaluddin's family.
In 1298, Ulugh Khan repulsed a Mongol invasion from the Chagatai Khanate, which greatly increased Alauddin's prestige. The next year, he and Nusrat Khan raided the wealthy province of Gujarat, obtaining a huge amount of wealth for Alauddin's treasury. He led the reinforcement unit in the Battle of Kili (1299) against the Mongols, and held command in the initial phases of the Siege of Ranthambore (1301). He died a few months after the Ranthambore campaign ended.