|State||New South Wales|
|Regions||NSW North Coast (IBRA), Central Tablelands, Hunter|
|Local government area||Mid-Western Regional|
|Part of||Hunter River catchment|
|- left||Cousins Creek, Growee River, Coggan Creek|
|- right||Reedy Creek (New South Wales), Wattle Creek, Lee Creek (New South Wales), Dry Creek (Bylong River)|
|Source||Wollemi National Park, Great Dividing Range|
|- location||near Rylstone|
|- elevation||748 m (2,454 ft)|
|Mouth||confluence with the Goulburn River|
|- location||north of Bylong|
|- elevation||218 m (715 ft)|
|Length||48 km (30 mi)|
|National park||Wollemi NP|
Bylong River rises in the central tablelands of the Capertee Valley, within Wollemi National Park, on the north-western slopes of the Great Dividing Range, below Goat Mountain, and flows generally north-east, joined by seven tributaries, including the Growee River, before reaching its confluence with the Goulburn River, north of the village of Bylong. The river descends 530 metres (1,740 ft) over its 48 kilometres (30 mi) course.
- "Place Name Search: Bylong River". Geoscience Australia. Commonwealth of Australia. 2010. Retrieved 26 February 2013.
- "Bylong River". Geographical Names Register (GNR) of NSW. Geographical Names Board of New South Wales. Retrieved 26 February 2013.
- "Map of Bylong River, NSW". Bonzle Digital Atlas of Australia. Retrieved 26 February 2013.