Ahning Lake (GPS: 6.36682, 100.74291) is a man-made lake in northern Kedah. It is located in Padang Terap District, to the north of Pedu Lake.
Ahning Lake was created as a result of damming Sungai Ahning. The dam was built in 1985 at a cost of US$20 million. It provides hydroelectric power as well as supplying water for use in Kedah.