| Parlung Tsangpo | |
| Subdivision Type1: | Country |
| Subdivision Name1: | China |
| Subdivision Type2: | State |
| Subdivision Name2: | Tibet Autonomous Region |
| Subdivision Type3: | Region |
| Subdivision Name3: | Nyingchi Prefecture |
| Length: | 266km (165miles) |
| Source1 Location: | China |
| Mouth Coordinates: | 29.8764°N 95.1231°W |
| River System: | Yarlung Tsangpo |
Parlung Tsangpo or Parlung Zangbo[1] (;), also known as Palongzangbu River,[2] is a river in Nyingchi, Tibet, China. It is the largest tributary on the left side of Yarlung Tsangpo. Its source is the Arza Gongla Glacier, at an elevation of 4900m. It first flows north into Ngagung Tso, then turn northwest to Rakwa Tso. It joins Yarlung Tsangpo near Bomê.
The total length of Parlung Tsangpo is 266 km, and the drop of elevation is 3360m. The drainage basin covers an area of 23,800 square kilometers. The lower part of Parlung flows through the Parlung Tsangpo Valley, which is among the deepest in the world.