Ng Tung River (; Hong Kong Hakka: Ng²tung² Ho²; also known as River Indus) is a river in the northeast New Territories, Hong Kong. Tributaries of the river include Tan Shan River and Kwan Tei River. It collects other major rivers like Shek Sheung River and Sheung Yue River in Sheung Shui, and finally empties into Sham Chun River (Shenzhen River).