Cape Sheffield is a cape forming the northwest extremity of Rugged Island in the South Shetland Islands, Antarctica. It was named for Captain James P. Sheffield, Master of the brig Hersilia of Stonington, Connecticut, in 1819–20 and 1820–21, the first American sealer known to have visited the South Shetland Islands. In 1819–20 he took 8,868 sealskins from headquarters at Rugged Island.
The point is located at which is 6 km west-northwest of Vund Point, 3.2 km north by west of Benson Point and 5.15 km southwest of Start Point, Livingston Island. (British mapping in 1968, detailed Spanish mapping in 1992, and Bulgarian mapping in 2005 and 2009).
