Algae Lake () is a narrow, winding lake, 9 miles (14 km) long and between 0.2 and 1 mile (0.3 and 1.6 km) wide, extending in an east–west direction in the ice-free Bunger Hills of Antarctica. It was first mapped from air photos taken by U.S. Navy Operation Highjump, 1946–47, and named Algae Inlet by the Advisory Committee on Antarctic Names because of the algae reported by Operation Highjump personnel, which cause varying tints to the meltwater ponds overlying the Bunger Hills and to the saline inlets and channels in the Highjump Archipelago area close to the north. Subsequent Soviet expeditions (1956–57) found this "inlet" to be a lake.