The Khanate of Sibir was a Turco-Mongol realm established in the late 15th century in the West Siberian Plain east of the Ural Mountains, along the Ob and Irtysh river basins. Emerging from the fragmented eastern wing of the Golden Horde, it stood as the northernmost Islamic state in medieval world history, controlling the immensely lucrative fur trade with Europe and Asia.
The vast geographic region known today as Siberia directly owes its name to the Khanate of Sibir. According to local linguistic traditions, the name derives either from the ancient Sabir nomadic tribes or from a Turkic term meaning 'the sleeping land'. Beneath its harsh boreal winters, Siberian Tatars ruled over diverse indigenous Khanty, Mansi, and Selkup hunting peoples in the dense taiga.
Under its last notable ruler, Kuchum Khan, the khanate actively promoted Islam and fortified its capital, Qashliq (also known as Sibir or Isker). In 1581, the legendary Cossack ataman Yermak Timofeyevich, backed by the wealthy Stroganov merchant dynasty, led an expedition armed with matchlock guns into the Siberian wilderness. After grueling wilderness warfare, Qashliq fell, and with Kuchum's ultimate defeat in 1598, the khanate collapsed, opening the boundless Siberian continent to Russian eastward expansion toward the Pacific.