尼洋河（藏文：ཉང་ཆུ，威利：nyang chu），雅鲁藏布江北岸支流。源出芒雄拉山口以西的拉木错，河源海拔5000米。先向东流，在林芝县附近转向南流。全长286公里，总落差2080米，流域面积1.7535万平方公里。与拉萨河通过米拉山分隔。

The Nyang River (*****: ཉང་ཆུ, Wylie: nyang chu; Chinese:尼洋曲; also transliterated as Niyang or Nanpan) is a major river in south-west ***** and the longest tributary of the Yarlung Tsangpo River.

The Nyang has a length of 307.5 km and originates at 5,000 meters above the sea level from the Cuomuliangla in the Goikarla Rigyu, west of the Mila Mountain. The river joins the Yarlung Tsangpo in Cemeng, Nyingchi, 2,580 meters below its source. With an average flow of 538 cubic meters per second, it has an aquatic power potential of 2.08 million kilowatts. Its largest tributary is the Ba River. It flows past the town of Bayi where it is crossed by the Bayi Zanchen bridge.