River Rangpo is a river in the Indian state of Sikkim. It is a tributary of the River Teesta, and is itself fed by the Rangpo chu. The town of Rangpo lies on its banks.
Rangpo River runs through most of East Sikkim and a few parts of the Darjeeling District of North Bengal. This tributary flows mainly from east to west with a variable channel pattern including braided, meandering, straight, gorge and blocked lake. Landslides are very common along the river bank as cliff-like bedrocks are well exposed along the river valley wall.