Sultan Mohammed Öz Beg, better known as Uzbeg or Ozbeg (1282–1341, reign 1313–1341), is the longest-reigning khan of the Golden Horde, under whose rule the state reached its zenith.

He is succeeded by his son Jani Beg.

He is the son of Toghrilcha and grandson of Mengu-Timur, who had been khan of the Golden Horde from 1267–1280.