Holl Island (66°25′S 110°25′E / 66.417°S 110.417°E) is a rocky, triangular-shaped Antarctic island, 1.7 mi (2.7 km) long, marking the southwest end of the Windmill Islands. Mapped from aerial photographs taken by USN Operation Highjump, 1946–1947, and USN Operation Windmill, 1947-1948. Named by the US-ACAN for Lt. Richard C. Holl, USNR, photogrammetrist with the Navy Hydrographic Office, who served as surveyor with the Operation Windmill parties which established astronomical control stations on Holl Island and along Queen Mary and Knox Coasts.
Churchill Point is the northwestern point of the island. It was named by the US-ACAN for Radioman Robert W. Churchill, USN, a member of the Wilkes Station party of 1958.