| Tanjil | |
| Pushpin Map: | Australia Victoria |
| Pushpin Map Caption: | Location of the Tanjil River mouth in Victoria |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | Victoria |
| Subdivision Type3: | Region |
| Subdivision Name3: | South East Coastal Plain (IBRA), West Gippsland |
| Subdivision Type5: | Local government areas |
| Subdivision Name5: | Shire of Baw Baw, Latrobe City |
| Length: | 34km (21miles) |
| Source1: | Tanjil River East Branch |
| Source1 Location: | below Mount Baw Baw |
| Source1 Elevation: | 1250m (4,100feet) |
| Source2: | Tanjil River West Branch |
| Source2 Location: | below Mount Tooronga, Tanjil Bren |
| Source2 Elevation: | 677m (2,221feet) |
| Source Confluence: | East and West branches of the Tanjil River |
| Source Confluence Location: | Mount Tanjil Nature Reserve, between and |
| Source Confluence Coordinates: | -37.9794°N 146.1933°W |
| Source Confluence Elevation: | 202m (663feet) |
| Mouth: | confluence with the Latrobe River |
| Mouth Location: | west of Lake Narracan |
| Mouth Coordinates: | -38.1503°N 146.2794°W |
| Mouth Elevation: | 53m (174feet) |
| River System: | West Gippsland catchment |
| Tributaries Left: | Boggy Creek |
| Tributaries Right: | Russell Creek (Victoria) |
| Custom Label: | National park |
| Extra: | [1] [2] |
The Tanjil River is a perennial river of the West Gippsland catchment, located in the West Gippsland region of the Australian state of Victoria.
Formed by the confluence of the Tanjil River West Branch that drains the eastern slopes of Mount Toorongo from an elevation of and the northwestern slopes of the Mount Baw Baw from an elevation of and the Tanjil River East Branch that drains the western slopes of Mount Baw Baw from an elevation of, the Tanjil River rises below Hill End within the Great Dividing Range, in the Mount Tanjil Nature Reserve east of and southwest of . The river flows in a highly meandering course generally south, then south by east, joined by two minor tributaries, before reaching its confluence with the Latrobe River west of both Lake Narracan and in the Latrobe City local government area. The river descends over its 34km (21miles) course.[2]
The Tanjil River is impounded by the Blue Rock Dam, that provides cooling water for thermal power stations sited in the Latrobe Valley, and to augment domestic water supplies. A small 2.4MW hydroelectric power station is located on the river below the dam wall.[3]
The Tanjil River sub-catchment area is managed by the West Gippsland Catchment Management Authority.