Lake Düden, also known as Lake Kulu, (Turkish: Düden Gölü or Kulu Gölü), is a brackish water lake in Konya Province, Turkey.
Lake Düden is located northwest of Lake Tuz and 5 km east of Kulu town in Konya Province at an elevation of 950 m. It is a shallow brackish water lake covering 860 ha area. The lake is fed mainly by Kulu Creek, aka Değirmenözü Creek, in the west. It has no outlet. Spring waters around lake contribute also to the lakes feeding. There are nine islets inside the lake. In the south of the lake, there is a fresh water lake named Little Lake (Turkish: Küçük Göl) surrounded by dense reeds. While the ducks generally brooding at the Little Lake in the south, the gulls and common terns prefer the islets in colonies. Lake Düden, Lake Little and their surrounding area of wetlands and steppes are declared protected area in 1992.
