Grand lac de Laffrey

{{Infobox lake

| name = Grand Lac de Laffrey

| image = Grand_Lac_de_Laffrey.jpg

| caption =

| image_bathymetry =

| caption_bathymetry =

| location = Isère

| coords = {{coord|45|0|40|N|5|46|40|E|type:waterbody_region:FR|display=inline,title}}

| type =

| inflow =

| outflow = Laffrey

| catchment =

|pushpin_map=France

| basin_countries = France

| length = {{convert|3|km|abbr=on}}

| width = {{convert|0.5|km|abbr=on}}

| area = {{convert|120|ha|abbr=on}}

| depth = {{convert|39|m|abbr=on}}

| max-depth =

| volume =

| residence_time =

| shore =

| elevation = {{convert|911|m|abbr=on}}

| frozen =

| islands =

| cities =

}}

The Grand lac de Laffrey ({{IPA|fr|ɡʁɑ̃ lak də lafʁɛ}}, Great Laffrey lake) is the largest of the Laffrey lakes, located in Matheysine 23 km south of Grenoble, in the Isère département of France.

Laffrey