The Nyang River (Tibetan: ཉང་ཆུ, Wylie: nyang chu; Chinese: 尼洋曲; also transliterated as Niyang or Nanpan) is a major river in south-west Tibet and the second largest tributary of the Yarlung Tsangpo River by discharge. The Nyang has a length of 307.5 km and originates at 5,000 meters above the sea level from the in the Goikarla Rigyu, west of the Mila Mountain. The river joins the Yarlung Tsangpo in , Nyingchi, 2,580 meters below its source. Its largest tributary is the Ba River. It flows past the town of Bayi where it is crossed by the Bayi Zanchen bridge.