Lac de Lessy
| Lac de Lessy | |
|---|---|
 | |
| Location | Haute-Savoie |
| Coordinates | 45°59′16″N 6°26′17″E / 45.98778°N 6.43806°ECoordinates: 45°59′16″N 6°26′17″E / 45.98778°N 6.43806°E |
| Basin countries | France |
| Surface area | 7.1 ha |
| Max. depth | 1.7 m |
| Residence time | 600 days |
| Surface elevation | 1730 m |
Lac de Lessy is a lake at Le Petit-Bornand-les-Glières in the Haute-Savoie, France.