万湖是德国柏林西南施特格利茨-策伦多夫区的一个分区，此分区是柏林的最西端。该分区以辖内的大万湖和小万湖得名。

这一分区亦是纳粹德国的万湖会议举办地。

Wannsee is a locality in the southwestern Berlin borough of Steglitz-Zehlendorf, Germany. It is the westernmost locality of Berlin. In the quarter there are two lakes, the larger Großer Wannsee (Greater Wannsee) and the Kleiner Wannsee (Little Wannsee), are located on the River Havel and are separated only by the Wannsee Bridge. The larger of the two lakes covers an area of 2.7 km (1.0 sq mi) and has a maximum depth of 9 m (30 ft).