Lac Cornu

{{Infobox lake

| name = Lac Cornu

| image = 2019 Lac Cornu.jpg

| caption =

| image_bathymetry =

|pushpin_map=France

| caption_bathymetry =

| 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.