The German place name Marienwerder refers to:
Marienwerder, the German name of the city Kwidzyn, in northern Poland Mareinwerder, the German name of the village Załęże, in northwestern Poland Marienwerder (region), a former government region of Prussia Marienwerder (district), a former district of Prussia Marienwerder, Brandenburg, a community in the administrative district of Barnim, Germany Part of the urban district Herrenhausen-Stöcken in the city of Hanover, Germany