Kemp Peninsula is an irregular ice-covered peninsula 48 kilometres (26 nmi) long in a north-south direction and 9.3 to 22.2 kilometres (5 to 12 nmi) wide. The peninsula rises gently to 305 metres (1,000 ft) and projects east between the heads of Mason Inlet and Mossman Inlet, on the east coast of Palmer Land, Antarctica.
The peninsula was first seen from the air in December 1940 by members of the U.S. Antarctic Service, who at that time photographed all but its northern extremity. During 1947 it was photographed from the air by the Ronne Antarctic Research Expedition, who in conjunction with the Falkland Islands Dependencies Survey (FIDS) charted it from the ground. It was named by the FIDS for Stanley W. Kemp, a British marine biologist and oceanographer, first Director of Research of the Discovery Investigations, 1924–36, and Director of the Plymouth Marine Laboratory, 1936–45.