Lake Clark is a lake in southern Alaska. It drains through Six Mile Lake and the Newhalen River into Iliamna Lake. The lake is about 64 km (40 mi) long and about 8 km (5.0 mi) wide.
Lake Clark was named for John W. Clark, chief of the Nushagak trading post in 1891 and the first American non-Native to see the lake. The Dena'ina Athabascan name is Qizjeh Vena which means "place where people gather lake"Lake Clark is within Lake Clark National Park and Preserve.