Lac de Longemer

{{Infobox lake

| name = Lac de Longemer

| image = Longemer1.jpg

| caption =

| image_bathymetry =

|pushpin_map=France

| caption_bathymetry =

| location = Vosges

| coords = {{coord|48.070278|6.950556|type:waterbody_region:FR_source:frwiki|display=inline,title}}

| type = glacial

| inflow =

| outflow = Vologne

| catchment =

| basin_countries = France

| length = {{convert|2000|m|abbr=on}}

| width = {{convert|500|m|abbr=on}}

| area = {{convert|0.76|km2|abbr=on}}

| depth =

| max-depth = {{convert|34|m|abbr=on}}

| volume =

| residence_time =

| shore =

| elevation = {{convert|736|m|abbr=on}}

| frozen =

| islands =

| cities =

| reference =

}}

Lac de Longemer is a lake near Xonrupt-Longemer, in Vosges, France. At an elevation of 736 m, its surface area is {{convert|0.76|km2|0|abbr=on}}.