Inder (; ) is a salt lake in Inder District, Atyrau Region, Kazakhstan.
The mineral Inderite and the plant Eremurus inderiensis were named after the lake.
Inder an endorheic lake in the northern part of the Caspian Lowland. It is located to the east of the Ural river. The southern foothills of the Inder Mountains rise above the northern and northeastern lakeshores. The lake is very shallow. Under the water surface there is a salt crust that is on average to thick. Inderbor town is located to the northwest of the lake.
There is one river flowing into the lake, but none come out of it. Inder is fed mainly by groundwater. The salt of the lake is of high quality. It contains potassium, bromine and boron. Up to 2021 Inder lake is recognized as the Type locality for seven minerals: Hydroboracite, Inderborite, Inderite, Kurgantaite, Kurnakovite, Preobrazhenskite and Volkovskite.