The Ada River is a perennial river of the Bemm River catchment, located in the East Gippsland region of the Australian state of Victoria.

Ada River rises below Mount Ellery, part of the Errinundra Plateau, in remote country in the Errinundra National Park, and flows generally south by east, before reaching its confluence with the Errinundra River, near Tommy Roundhead Hill, northwest of the town of Cann River in the Shire of East Gippsland. The river descends 957 metres (3,140 ft) over its 11 kilometres (6.8 mi) course.

The Ada River sub-catchment area is managed by the East Gippsland Catchment Management Authority.

• List of rivers of Australia

• "Bemm River sub-catchment". East Gippsland Catchment Management Authority. Government of Victoria.
• "Bemm River - Catchment Map" (map). East Gippsland Catchment Management Authority. Government of Victoria.
• "Errinundra National Park: Park notes" (PDF). Parks Victoria. Government of Victoria. August 2012. Archived from the original (PDF) on 11 January 2014. Retrieved 11 January 2014.
• East Gippsland Catchment Management Authority (2013). East Gippsland regional catchment strategy 2013 -2019 (PDF). Bairnsdale: East Gippsland Catchment Management Authority. ISBN 978-0-9758164-6-2. Archived from the original (PDF) on 14 January 2014. Retrieved 13 January 2014.