| Retreat | |
| Name Other: | Little River[1] |
| Map Size: | 250 |
| Pushpin Map: | Australia New South Wales |
| Pushpin Map Size: | 250 |
| Pushpin Map Caption: | The mouth of the Retreat River located in New South Wales |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | New South Wales |
| Subdivision Type3: | Region |
| Subdivision Name3: | South Eastern Highlands (IBRA), Central West |
| Subdivision Type5: | LGA |
| Subdivision Name5: | Oberon |
| Source1: | Great Dividing Range |
| Source1 Location: | near Shooters Hill |
| Mouth: | confluence with the Abercrombie River |
| Mouth Location: | near Hadley |
| Mouth Coordinates: | -34.004°N 149.7757°W |
| River System: | Lachlan catchment, Murray–Darling basin |
| Custom Label: | National park |
| Custom Data: | Abercrombie River NP |
The Retreat River, a perennial stream[1] that is part of the Lachlan catchment within the Murray–Darling basin, is located in the central western region of New South Wales, in eastern Australia.
The Retreat River rises on the western slopes of the Great Dividing Range, near Shooters Hill, and flows generally to the south-west, before reaching its confluence with the Abercrombie River, near Hadley.
The river flows adjacent to the Abercrombie River National Park, with access at The Sink campground.[2]