Leissen
Leissen , also Leißen , is a place name:
- Leissen , Olsztyn County, East Prussia, since 1945: Łajsy (Gietrzwald) in the Olsztyński powiat, Warmian-Masurian Voivodeship, Poland
- Leißen , Aussig district, Sudetenland, since 1945: Lysá (Povrly) in Okres Ústí nad Labem, Ústecký kraj, Czech Republic
- Leißen , Preußisch Eylau district, East Prussia, since 1946: Dolgorukowo (Kaliningrad) in Bagrationovsk Rajon, Kaliningrad Oblast, Russia