| Horstsee | |
| Location: | Stade, Lower Saxony |
| Coords: | 53.5942°N 9.4617°W |
| Pushpin Map: | Lower Saxony |
| Basin Countries: | Germany |
| Area: | 3.75ha |
| Depth: | 4m-5mm (13feet-16feetm) |
| Max-Depth: | 9m (30feet) |
| Elevation: | 6m (20feet) |
Horstsee is a lake in Stade, Lower Saxony, Germany. At an elevation of 6 m, its surface area is 3.75 ha.