The Dandenong Creek is an urban creek of the Port Phillip catchment, located in the eastern and south-eastern Greater Melbourne region of the Australian east coast state of Victoria. The creek descends approximately 550 metres (1,800 ft) over its course of 53 kilometres (33 mi) before joining the Eumemmerring Creek to form the Patterson River and eventually draining into the Beaumaris Bay.

The Patterson River is a partly man-made urban river of the Port Phillip catchment in the Australian east coast state of Victoria, located in the outer southeastern suburbs of the Greater Melbourne region. Under the name "Patterson", it is the shortest river in Victoria at only 5 km (3.1 mi) in length, although its main stem tributary and de facto upper section, the Dandenong Creek, is over 53 km (33 mi) long.