The Muma River (Muma He 牧马河) is a right tributary of the Han River in the Yangtze river basin of northern China. It has a length of 128 kilometres (80 mi) and a drainage area of 2,782 square kilometres (1,074 sq mi). It originates in and flows entirely within Xixiang County of Shaanxi Province. The annual average flow is 45 cubic metres per second (1,600 cu ft/s). It has a natural drop of 1,613 metres (5,292 ft) and water reserves of 90,000 kilowatts. It arises near the border with Sichuan Province at , flows northwest and debouches into the Han River at Coordinates: .
The main branch of the Muma River is navigable by small boats as far south as the village of Matsung T'an.
- Muma He (Approved) at GEOnet Names Server, United States National Geospatial-Intelligence Agency
- 王杰等主编 (Wang Jiedeng), ed. (1997). 长江大辞典 (Yangtze Dictionary). Wuhan: 武汉出版社 (Wuhan Press). ISBN 978-7-5430-1615-6.
- Teichman, Eric (1921). Travels Of A Consular Officer In North-West China. Cambridge, England: Cambridge University Press. pp. 34&ndash, 35. OCLC 257595152.
- "Relation: Muma basin (Hanshui) (2137001)". OpenStreetMap.