Sheosar Lake () is a lake in Deosai Plains, Northern Areas of Pakistan. The lake is situated in Deosai National Park in Gilgit-Baltistan Province. The lake is at an elevation of 4,142 m (13,589 feet). Its approximate length is reported to be 2.3 km (1.4 miles), width 1.8 km (1.2 miles) and average depth 40 m (131 feet).