|Yimmang River, Cedar Arms River|
|Name origin: In honour of William Paterson|
|State||New South Wales|
|Regions||NSW North Coast (IBRA), Hunter, Mid North Coast|
|Local government areas||Dungog; Maitland; Port Stephens|
|Part of||Hunter River catchment|
|- left||Sheepstation Creek, Allyn River, Dunns Creek (New South Wales)|
|- right||Boonabilla Creek, Horse Creek (New South Wales), Fenwicks Creek|
|Towns||Gresford, Vacy, Paterson, Woodville, Hinton|
|- location||near Careys Peak|
|- elevation||256 m (840 ft)|
|- elevation||3 m (10 ft)|
|Length||159 km (99 mi)|
|National park||Barrington Tops National Park|
Course and features
Paterson River rises in the Barrington Tops National Park, west by north of Careys Peak, and flows generally south and southeast, joined by six minor tributaries including the Allyn River at Vacy, before reaching its confluence with the Hunter River between Hinton and Morpeth. Between Hinton and Duns Creek, the Paterson River forms the border between the Port Stephens and Maitland local government areas. The river system courses through fertile the farming land of the Paterson and Allyn River Valleys and the historic Patersons Plains; descending 933 metres (3,061 ft) over its 151 kilometres (94 mi) course.
The river is impounded by Lostock Dam, located 48 kilometres (30 mi) downstream from the source in the Barringtons. The embankment dam was constructed by the New South Wales Department of Water Resources to supply water for irrigation and was completed in 1971. The river is tidal to above the village of Paterson and below Vacy.
- "Paterson River". Geographical Names Register (GNR) of NSW. Geographical Names Board of New South Wales. Retrieved 24 March 2013.
- "Paterson River, NSW". Bonzle Digital Atlas of Australia. Retrieved 24 March 2013.
- "Lostock Dam". Water delivery: dams. State Water Corporation. Retrieved 20 April 2013.
- "Lostock Dam" (PDF brochure). State Water Corporation. 2009. Retrieved 20 April 2013.