Cape Williams () is an ice-covered cape at the east side of the terminus of Lillie Glacier. Discovered in February 1911 when the Terra Nova of the British Antarctic Expedition, 1910-13, explored the area westward of Cape North. Named for William Williams, Chief Engine-room Artificer on the Terra Nova.
This article incorporates public domain material from the United States Geological Survey document "Cape Williams" (content from the Geographic Names Information System).