The Jungfernsee (translated "Virgin Lake") is north of Potsdam, Germany.

The lake is part of a federal waterway and one point where the Sacrow–Paretz Canal connects to the Havel.

Besides that, other sights around the Jungfernsee include Cecilienhof to the southwest, the Heilandskirche in Sacrow to the north and the park and palace of Glienicke, southeast again.

The former royal Dairy in the New Garden also lies on the shore of the lake and is today a restaurant and brewery.

In 1999, the south shore was added to the Palaces and Parks of Potsdam and Berlin World Heritage Site.