Cape Westbrook () is a snow-covered cape forming the southwest extremity of Alexander Island. Mapped by United States Geological Survey (USGS) from aerial photographs taken by Ronne Antarctic Research Expedition (RARE), 1947, U.S. Navy, 1967–68, and from U.S. Landsat imagery taken 1972-73. Named by Advisory Committee on Antarctic Names (US-ACAN) for Captain Darrel E. Westbrook, Jr., U.S. Navy, Commander, U.S. Naval Support Force, Antarctica, from June 1978 to June 1980.
This article incorporates public domain material from the United States Geological Survey document "Cape Westbrook" (content from the Geographic Names Information System).