The Tanggula, Tangla, Tanglha, or Dangla Mountains is a mountain range in the central part of the Qinghai-Tibet Plateau in Tibet. Administratively, the range is in the Nagqu Prefecture of the Tibet Autonomous Region, with the central section extending into the Tanggula Town and the eastern section entering the Yushu Tibetan Autonomous Prefecture of Qinghai province.

Nagqu is a prefecture-level city in the north of the Chinese autonomous region of Tibet. On May 7, 2018, the former Nagqu Prefecture was officially declared the sixth prefecture-level city in Tibet after Lhasa, Shigatse, Chamdo, Nyingchi and Shannan. The regional area, covering an area of 450,537 km2 (173,953 sq mi), is bordered by Bayingolin and Hotan Prefectures of Xinjiang to the north, Haixi, Yushu Prefectures of Qinghai and Chamdo to the east, Nyingchi, Lhasa and Shigatse to the south, Ngari Prefecture to the west. As of the 2010 census, it had a population of 462,381. Since its official establishment in 2018, it is the largest prefecture-level city by area in the world, being slightly larger than Sweden.