Lha-bzang Khan was the ruler of the Khoshut tribe of the Oirats. He was the son of Tenzin Dalai Khan (1668–1701) and grandson of Güshi Khan, being the last khan of the Khoshut Khanate and Oirat King of Tibet. He acquired effective power as ruler of Tibet by eliminating the regent (desi) Sangye Gyatso and the Sixth Dalai Lama, Tsangyang Gyatso, but his rule was cut short by an invasion by another group of Oirats, the Dzungar people. At length, this led to the direct involvement of the Chinese Qing dynasty in the Tibetan politics.

Oirats or Oirds, also formerly Eluts and Eleuths, are the westernmost group of the Mongols whose ancestral home is in the Altai region of Siberia, Xinjiang and western Mongolia.