Lambert Nunatak () is a rock nunatak that protrudes through the snow mantle of the southeastern Coulter Heights, near the coast of Marie Byrd Land, Antarctica. It was mapped by the United States Geological Survey from surveys and U.S. Navy air photos, 1959–65, and was named by the Advisory Committee on Antarctic Names for Paul A. Lambert, U.S. Navy, Senior Quartermaster on the , 1961–62. References Nunataks of Marie Byrd Land