Ziernsee

Ziernsee is a lake in the Mecklenburg Lake District, in Germany. Whilst most of the lake is in the district of Mecklenburgische Seenplatte (municipality Priepert) in the state of Mecklenburg-Vorpommern, a portion of its southern shore is in the state of Brandenburg.

The lake has an elevation of 54.6 m and a surface area of 1.1 km2.

The navigable River Havel flows through the Ziernsee, entering it via a 0.3 km long channel from the Ellbogensee to the west, and exiting via a 5.4 km channel to the Röblinsee. Navigation is administered as part of the Obere–Havel–Wasserstraße.