Mummel River, a watercourse of the Manning River catchment, is located in the Northern Tablelands and Mid North Coast districts of New South Wales, Australia.

Mummel River rises on the eastern slopes of the Great Dividing Range, below Mount Sugarloaf, southeast of Walcha and flows generally south by west, southeast, and then south southeast, joined by one minor tributary, before reaching its confluence with the Cooplacurripa River, north of Giro, northwest of Taree. The river descends 898 metres (2,946 ft) over its 65 kilometres (40 mi) course.^[1] There are two fault lines that are near the path of the river.^[2]

• Rivers of New South Wales
• List of rivers of New South Wales (L–Z)
• List of rivers of Australia