| Buck Lake | |
| Location: | South Frontenac, Ontario, Canada |
| Volume: | [1] |
| Elevation: | above sea level[2] |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Southern Ontario |
Buck Lake is a lake located in South Frontenac, Ontario, Canada. Its inflows are Milk Lake and various rivers and its outflow is the Mississauga Creek through a dam. It has a surface area of .[3]
The lake has an average depth of but can reach depths up to . It has an approximate shore length of .