Zanda County or Tsamda County (, ) is a county in the Ngari Prefecture to the extreme west of the Tibet Autonomous Region of China. Its seat of power is at Tholing, the former capital of the Guge kingdom. Zanda (Tsamda) was established in 1956 through a merger of Tsaparang and Daba counties.
Zanda County is bounded by India's Himachal Pradesh state to the west, Uttarakhand State to the south, Ladakh to the northwest, Gar County to the northeast and Burang County to the southeast. Ancient Zanda horse (Hipparion zandaense) skeletons have been found in Zanda County's Sutlej basin.
Zanda county is divided into 1 town and 4 townships: