The Rangpo Chu is a tributary of the River Rangpo, which in turn is a tributary of the Teesta River in the Indian state of Sikkim. It originates near the Jelep La pass in East Sikkim district. It feeds the high-altitude Lake Menmecho. The word chu means "little river" in Tibetan.
27°11′39″N 88°36′40″E / 27.194098°N 88.611030°E