| Lower Buckhorn Lake | |
| Image Bathymetry: | Kawartha Lakes w legend.png |
| Caption Bathymetry: | Lower Buckhorn Lake (K) and the other Kawartha Lakes. |
| Coords: | 44.55°N -78.2583°W |
| Pushpin Map: | Ontario |
Lower Buckhorn Lake is a lake located within the townships of Selwyn and Trent Lakes in Peterborough County, Ontario, Canada and is one of the Kawartha Lakes. Numerous small islands are located within the lake while the southern area is dominated by a large bay known as Deer Bay. Lovesick Lake is the eastern end of Lower Buckhorn and separated mainly by Wolf Island.