| Ada | |
| Pushpin Map: | Australia Victoria |
| Pushpin Map Caption: | Mouth of the Ada River in Victoria |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | Victoria |
| Subdivision Type3: | Region |
| Subdivision Name3: | South East Corner (IBRA), East Gippsland |
| Subdivision Type5: | Local government area |
| Subdivision Name5: | Shire of East Gippsland |
| Length: | 11km (07miles) |
| Source1: | Mount Ellery |
| Source1 Location: | Errinundra National Park |
| Source1 Elevation: | 1150m (3,770feet) |
| Mouth: | confluence with the Errinundra River |
| Mouth Location: | near Tommy Roundhead Hill |
| Mouth Coordinates: | -37.4025°N 148.8933°W |
| Mouth Elevation: | 196m (643feet) |
| River System: | Bemm River catchment |
| Custom Label: | National park |
| Custom Data: | Errinundra NP |
| Extra: | [1] [2] |
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 in the Shire of East Gippsland. The river descends over its course.[2]
The Ada River sub-catchment area is managed by the East Gippsland Catchment Management Authority.