| Turtle Lake South Lake | |
| Settlement Type: | Hamlet |
| Pushpin Map: | Saskatchewan#Canada |
| Pushpin Map Caption: | Location in Saskatchewan |
| Pushpin Mapsize: | 255px |
| Coordinates: | 53.5169°N -108.7078°W |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Saskatchewan |
| Subdivision Type2: | Census division |
| Subdivision Name2: | 17 |
| Subdivision Type3: | Rural municipality |
| Subdivision Name3: | Mervin No. 499 |
| Unit Pref: | Metric |
| Population Density Km2: | auto |
| Blank Name: | Highway(s) |
| Blank Info: | Highway 795 |
| Blank1 Name: | Railway(s) |
| Blank2 Name: | Waterway(s) |
| Blank2 Info: | Turtle Lake |
Turtle Lake South Bay[1] is a hamlet in the Canadian province of Saskatchewan. It is on the southern shore of Turtle Lake where the Turtlelake River flows out.
In the 2021 Census of Population conducted by Statistics Canada, Turtle Lake South Bay had a population of 61 living in 32 of its 107 total private dwellings, a change of from its 2016 population of 41. With a land area of, it had a population density of in 2021.[2]