{{Short description|Lake in Haute-Savoie, France}} {{Unreferenced|date=May 2026}} {{Infobox lake | name = Lac Cornu | image = 2019 Lac Cornu.jpg | caption = | image_bathymetry = |pushpin_map=France | caption_bathymetry = | location = Chamonix-Mont-Blanc, Haute-Savoie | coords = {{Coord|45|57|28|N|6|50|54|E|region:FR_type:waterbody|display=inline,title}} | type = | inflow = | outflow = | catchment = | basin_countries = France | length = {{convert|410|m|abbr=on}} | width = {{convert|340|m|abbr=on}} | area = {{convert|5.4|ha|abbr=on}} | depth = | max-depth = {{convert|22|m|abbr=on}} | volume = | residence_time = 250 days | shore = | elevation = {{convert|2276|m|abbr=on}} | frozen = | islands = | cities = }} '''Lac Cornu''' is a lake in the Aiguilles Rouges massif of Haute-Savoie, France. It is located at an elevation of 2,276 m with a surface area of 5.4 ha.

''Petit Lac Cornu'' is located 500 m North West, at an elevation of 2,243 m. Its surface area is 4,700 m².

thumb|Due to its glacial origin, the water of Lake Cornu enjoys a crystalline color

Cornu Category:Chamonix

{{HauteSavoie-geo-stub}}