| Wardersee | |
| Location: | Kreis Segeberg, Schleswig-Holstein |
| Pushpin Map: | Schleswig-Holstein |
| Coords: | 53.9756°N 10.4194°W |
| Inflow: | Trave, Bißnitz |
| Outflow: | Trave |
| Basin Countries: | Germany |
| Area: | 3.6km2 |
| Max-Depth: | 10.8m (35.4feet) |
Wardersee is a lake in Kreis Segeberg, Schleswig-Holstein, Germany. At its elevation, its surface area is 3.6 km².