Naturschutzsee Füssenich

{{Infobox lake

| name = Neffelsee

| image =Neffelsee Zülpich.jpg

| caption =

| image_bathymetry =

| caption_bathymetry =

|pushpin_map=North Rhine-Westphalia

| coords = {{coord|50|41|50|N|06|37|31|E|region:DE-NW_type:waterbody_source:dewiki|display=inline,title}}

| type =

| inflow = Neffelbach

| outflow = Neffelbach

| catchment =

| basin_countries = Germany

| length =

| width =

| area = {{convert|65|ha|abbr=on}}

| depth =

| max-depth = {{convert|28|m|abbr=on}}

| volume =

| residence_time =

| shore =

| elevation =

| frozen =

| islands =

| cities =

| reference =

}}

Neffelsee (also Naturschutzsee Füssenich) is a lake in Zülpich, North Rhine-Westphalia, Germany. With a depth of 28 m, its surface area is 65 ha.