Timbarra River, a mostly perennial stream of the Clarence River catchment, is located in the Northern Tablelands district of New South Wales, Australia.

Timbarra River rises on the slopes of Gibraltar Range, east of Bald Nob, and flows generally north northeast, joined by four minor tributaries before reaching its confluence with the Clarence River, south southwest of Tabulam. The river descends 923 metres (3,028 ft) over its 169 kilometres (105 mi) course; and flows through the Gibraltar Range National Park in its upper reaches. Between Tenterfield and Grafton, the course of Timbarra River flows adjacent to the Bruxner Highway.

• Rivers of New South Wales

29°20′S 152°15′E / 29.333°S 152.250°E / -29.333; 152.250