|Duckmaloi, Fish River, Duck Maloi River|
Duckmaloi River, near Oberon, after heavy rainfall, 2013
|State||New South Wales|
|Regions||South Eastern Highlands (IBRA), Central Tablelands|
|Local government area||Oberon|
|Part of||Macquarie River, Murray–Darling basin|
|Source||Great Dividing Range|
|- location||near Shooters Hill|
|- elevation||1,280 m (4,199 ft)|
|Mouth||confluence with the Fish River|
|- location||near Oberon|
|- elevation||1,010 m (3,314 ft)|
|Length||27 km (17 mi)|
The Duckmaloi River rises on the western slopes of the Great Dividing Range east of Shooters Hill, and flows generally to the north by east, where it forms its confluence with the Fish River near Oberon; dropping 265 metres (869 ft) over the course of its 27 kilometres (17 mi) length.
A small weir on the river, called the Duckmaloi Weir, forms part of the Fish River Water Supply Scheme and was constructed during 1963. The Scheme supplies water to Oberon and Lithgow Councils and the Sydney Catchment Authority for town water supplies, as well as Wallerawang and Mount Piper power stations owned by Delta Electricity for power generation purposes. The waters surrounding the weir are a site for a large platypus colony.
- "Duckmaloi River". Geographical Names Register (GNR) of NSW. Geographical Names Board of New South Wales. Retrieved 25 January 2013.
- "Map of Duckmaloi River". Bonzle.com. Retrieved 25 January 2013.
- "Fish River Water Supply Scheme – review of water sharing arrangements" (PDF). NSW Office of Water. Government of New South Wales. March 2012. Retrieved 14 April 2013.
- Barrett, Denis (2008). "Nomination of the Fish River Water Supply Scheme as a National Engineering Landmark". Engineering Heritage Australia. Engineers Australia. Retrieved 14 April 2013.