| Trappensee | |
| Location: | Baden-Wuerttemberg, Germany |
| Coordinates: | 49.1389°N 9.2536°W |
| Type: | lake |
| Pushpin Map: | Germany |
| Pushpin Map Alt: | Location of the lake in Germany. |
Trappensee is a small lake in the eastern city of Heilbronn in northern Baden-Wuerttemberg, Baden-Wuerttemberg, Germany.It is approximately east of the city center. In the middle of the lake there is the Trappensee castle, a water castle that dates back to the 16th century and was rebuilt in its current shape in the 18th century.