Lac de Roy

{{Infobox lake

| name = Lac de Roy

| image = Lac de Roy 10.jpg

| caption =

| image_bathymetry =

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|pushpin_map=France

| location = Haute-Savoie

| coords = {{Coord|46|8|36|N|6|34|25|E|region:FR_type:waterbody|display=inline,title}}

| inflow =

| outflow =

| catchment =

| basin_countries = France

| length = {{convert|265|m|ft|abbr=on}}

| width = {{convert|155|m|ft|abbr=on}}

| area =

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| shore =

| elevation = {{convert|1680|m|abbr=on}}

| frozen =

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}}

Lac de Roy is a lake in Haute-Savoie, France. It is located 2 km west of le Praz de Lys (Praz de Lys-Sommand?) ski resort, in the commune of Taninges.