|Name origin: Possibly named after Naas, Ireland|
|Territory||Australian Capital Territory|
|Regions||South Eastern Highlands (IBRA), Capital Country|
|Part of||Murrumbidgee River, Murray–Darling basin|
|- left||Nass Creek, Left Hand Creek (Australian Capital Territory), Gudgenby Creek, Reedy Creek (Australian Capital Territory)|
|- location||Namadgi National Park|
|- elevation||898 m (2,946 ft)|
|Mouth||confluence with the Gudgenby River|
|- location||south of Tharwa|
|- elevation||631 m (2,070 ft)|
|Length||26 km (16 mi)|
The river rises in the southern ranges of Namadgi National Park, south of Canberra, with flow generated by runoff and melting snow during spring from the Snowy Mountains. The river flows generally north, joined by four minor tributaries, before reaching its confluence with the Gudgenby River, south of Tharwa; descending 266 metres (873 ft) over its 26 kilometres (16 mi) course.
- "Naas River". Place name search. Government of the Australian Capital Territory. Retrieved 12 February 2013.
- "Map of Naas River, ACT". Bonzle Digital Atlas of Australia. Retrieved 6 February 2013.
- "Namadgi National Park Revised Draft Plan of Management" (PDF). Department of Territory and Municipal Services. Government of the Australian Capital Territory. 2007. Retrieved 13 February 2013.
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