The Emu River is a perennial river for most of its length, located in the north-western region of Tasmania, Australia. It was named by Henry Hellyer, an early explorer who saw emu tracks in the vicinity.

The river rises below Companion Hill (853 m (2,799 ft)) near Saint Valentines Peak (1,107 m (3,632 ft)), passes through Companion Reservoir, and flows generally north into Emu Bay at Wivenhoe. The river descends 548 metres (1,798 ft) over its 52.2-kilometre (32.4 mi) course.

• List of rivers of Australia § Tasmania