Diexi Lake () is a lake in Diexi, Mao County, Sichuan, China.
Diexi Lake is a landslide dam-created lake formed in the 1933 Diexi earthquake and covers 3.5 square kilometers. The old town of Diexi sank into this lake. The remnants of the town's watch towers, a temple, stone lions and cliff murals are still visible today.