Williams Cliff () is a prominent rock cliff that stands out from the ice-covered southwest slopes of Mount Erebus, situated 6 nautical miles (11 km) east of Cape Barne on Ross Island. This rock cliff was mapped by the British Antarctic Expedition under Scott, 1910-13, and identified simply as Bold Cliff on maps resulting from that expedition. It was named Williams Cliff by the Advisory Committee on Antarctic Names (US-ACAN) in 1964 to commemorate Richard T. Williams, who lost his life when his tractor broke through the ice at McMurdo Sound in January 1956.