Lake Manchar (, ), also spelled Manchhar, is the largest natural freshwater lake in Pakistan, and is one of Asia's largest. It is located west of the Indus River, in Jamshoro District and Dadu District, Sindh - 18 km away from Sehwan Sharif. Lake Manchar collects water from numerous small streams in the Kirthar Mountains, and then empties into the Indus River. The lake's surface area fluctuates with the seasons - from as little as 36 km², to as much as 500 km² during monsoon rains.