The Wollondilly River is a perennial river in New South Wales, Australia. It was originally a tributary of the Warragamba River, and hence of the Nepean and Hawkesbury Rivers. Today it flows into Lake Burragorang, created by construction of the Warragamba Dam across the Warragamba River, which is the major water supply for the Sydney region.[1]
The Wollondilly River river rises about 7 kilometres (4.3 mi) east of Crookwell and initially flows south to a point near Pomeroy. It then flows south-east and then east through Goulburn, where it is joined by the Mulwaree River. At Towrang the river turns north-east to a point near Bullio, where it is joined by the Wingecarribee River. From here the Wollondilly River takes a wide detour to the north-west to Barrallier, where it turn east before eventually regaining its north-easterly course into Lake Burragorang. It has a total length of approximately 156 kilometres (97 mi).[1]
Wollondilly Shire is a local government area that is named after the Wollondilly River.