| Großer Wummsee | |
| Location: | Landkreis Ostprignitz-Ruppin, Brandenburg |
| Pushpin Map: | Brandenburg |
| Coords: | 53.1883°N 12.8003°W |
| Outflow: | none |
| Basin Countries: | Germany |
| Area: | 1.52km2 |
| Max-Depth: | 35m (115feet) |
| Elevation: | 610m (2,000feet) |
Großer Wummsee is a lake in Landkreis Ostprignitz-Ruppin, Brandenburg, Germany. At an elevation of 61,0 m, its surface area is 1.52 km².