Little Rubicon River should not be confused with Rubicon River (Victoria).
| Little Rubicon | |
| Name Etymology: | Latin |
| Map Size: | 300 |
| Pushpin Map: | Australia Victoria |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the Little Rubicon River mouth in Victoria |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | Victoria |
| Subdivision Type3: | Region |
| Subdivision Name3: | South Eastern Highlands bioregion (IBRA), Northern Country/North Central |
| Subdivision Type5: | LGA |
| Subdivision Name5: | Murrindindi |
| Source1: | Victorian Alps, Great Dividing Range |
| Source1 Location: | below Blue Range |
| Source1 Coordinates: | -37.3425°N 145.8375°W |
| Mouth: | confluence with the Rubicon River |
| Mouth Location: | in a remote state forestry area |
| Mouth Coordinates: | -37.3497°N 145.8494°W |
| River System: | Goulburn Broken catchment, Murray-Darling basin |
| Custom Label: | Nature reserve |
The Little Rubicon River, an inland perennial river of the Goulburn Broken catchment, part of the Murray-Darling basin, is located in the lower South Eastern Highlands bioregion and Northern Country/North Central regions of the Australian state of Victoria. The headwaters of the Little Rubicon River rise on the western slopes of the Victorian Alps and descend to flow into the Rubicon River.
The Little Rubicon River rises from the Great Dividing Range below the Blue Range east of the Cathedral Ranges State Park, and flows southeast, fueled by runoff from the Blue and Cerberean Ranges before reaching its confluence with the Rubicon River in a remote state forestry area, southwest of the town of .