| Klostersee (Lehnin) | |
| Pushpin Map: | Brandenburg |
| Location: | Brandenburg |
| Coords: | 52.3335°N 12.7413°W |
| Inflow: | Emster |
| Outflow: | Emster |
| Basin Countries: | Germany |
| Area: | 0.38km2 |
| Max-Depth: | 4m-6mm (13feet-20feetm) |
| Elevation: | 29m (95feet) |
Klostersee (Lehnin) is a lake in Brandenburg, Germany. At an elevation of 29 m, its surface area is 0.38 km². It is located in the municipality of Kloster Lehnin, Potsdam-Mittelmark district.