Tannsee
Tannsee is a German place name:
- Tannsee , Marienburg district, West Prussia, since 1945: Świerki (Nowy Staw) , village in the Powiat Malborski, Pomeranian Voivodeship, Poland
- Tannsee , until 1935: Kasenowsken , Gumbinnen district, East Prussia, since 1946: Jelowoje (Kaliningrad) , settlement in Gussew Rajon, Kaliningrad Oblast, Russia