Bennett Bluff is a bluff, 810 metres (2,660 ft) high, between the upper reaches of Venzke Glacier and Berry Glacier, 7 nautical miles (13 km) south-southwest of the Perry Range, in Marie Byrd Land. The bluff has prominent rock exposures on the north wall and was first observed and photographed from aircraft of the United States Antarctic Service on December 18, 1940. It was mapped in detail by the United States Geological Survey, 1959–65, and named by the Advisory Committee on Antarctic Names for Clarence E. Bennett, U.S.