Lake Marmara (Turkish: Marmara Gölü) is a lake in Manisa Province, western Turkey, bordered by the district areas of Gölmarmara to the northwest, whose name itself is inspired by the lake, and in larger part by Salihli.
Lake Marmara is located in the alluvial valley of the Gediz River and at 79 m, is slightly lower than the surrounding plains of the river.
Aside from being a recreational center for the province as a whole, Lake Marmara is also an important source for fishing and agricultural irrigation and an Important Bird Area.
