Little River (Wollondilly) should not be confused with Little River (Wingecarribee).
| Little | |
| Name Other: | Tomahawk Creek, The Little River, Unga Creek |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | New South Wales |
| Subdivision Type3: | Region |
| Subdivision Name3: | Sydney Basin (IBRA), Southern Highlands |
| Subdivision Type5: | Local government area |
| Subdivision Name5: | Wollondilly |
| Length: | 27km (17miles) |
| Source1: | Nattai Tableland |
| Source1 Location: | north of Hilltop, near Bargo |
| Source1 Elevation: | 602m (1,975feet) |
| Mouth: | confluence with the Nattai River |
| Mouth Location: | Nattai |
| Mouth Elevation: | 127m (417feet) |
| River System: | Hawkesbury-Nepean catchment |
| Custom Label: | National park |
| Custom Data: | Nattai National Park |
| Extra: | [1] |
The Little River, a perennial river that is part of the Hawkesbury-Nepean catchment, is located in the Southern Highlands region of New South Wales, Australia.
The Little River rises north of the locality of Hilltop and west of the Hume Freeway near Bargo, and flows generally north northeast and then north northwest, before reaching its confluence with the Nattai River south of the locality of Nattai. The river descends over its 27km (17miles) course.[1]
The river flows through the Nattai National Park and is a source of water for the Sydney region.