Nyenchen Tanglha or Nyainqêntanglha (Tibetan: གཉན་ཆེན་ཐང་ལྷ་, Wylie: Gnyan-chen-thang-lha; Chinese: 念青唐古拉山, Pinyin: Niànqīng Tánggǔlā Shān) is a mountain range lying approximately 300 kilometer north-west of Lhasa in central Tibet.
The range's highest peak, Mount Nyainqêntanglha, stands at 7,162 metres in Damxung County; the nearest town to this peak is Yangbajain. The mountain range has more than thirty peaks over 6,000 metres high, and four are more than 7,000 metres high.
The Nyainqên Tanglha range separates the basin of the Yarlung Tsangpo River (Brahmaputra) in the south from the endorheic basins of north-eastern Tibet in the north. In particular, it lies to the south of Namtso Lake (Tengrinor), the second largest saltwater lake in Tibet; it is said to be the highest saline lake in the world at 4,716 metres (15,472 ft). Extending into the center of the lake is Zaxi Peninsula with its Zaxi Temple.