Killingbeck Island () is a small island lying east of Rothera Point, off the southeast coast of Adelaide Island. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1964 for John B. Killingbeck, British Antarctic Survey (BAS) glaciologist in 1960-63.
This article incorporates public domain material from the United States Geological Survey document "Killingbeck Island" (content from the Geographic Names Information System).