Traunsee (German pronunciation (help·info)) is a lake in the Salzkammergut, Austria, located at . Its surface is approximately 24.5 km² and its maximum depth is 191 metres. It is a popular tourist destination, and its attractions include Schloss Ort, a medieval castle.
|Primary inflows||Traun River|
|Primary outflows||Traun River|
|Max. length||12 km (7.5 mi)|
|Max. width||3 km (1.9 mi)|
|Surface area||24.5 km2 (9.5 sq mi)|
|Max. depth||191 m (627 ft)|
|Surface elevation||423 m (1,388 ft)|
|Settlements||Gmunden, Ebensee, Altmunster, Traunkirchen|
At the North end of the lake is Gmunden, at the south end is Ebensee. The lake is surrounded by mountains, including the Traunstein, and a number of other towns and villages surround the lake, including Altmünster and Traunkirchen.
There is a local legend that speaks of a Waterhorse that lives in the lake. Records mention a mermaid riding on the back of a creature who lives in the waters. Locals refer to it as "Lungy" and photographs have been taken of the creature. 
- Media related to Traunsee at Wikimedia Commons