福斯特半岛是南极洲的半岛，位于帕尔默地东岸，美国地质调查局在1974年把半岛绘入地图，该半岛以美国研究队伍的海洋学家命名。

Foster Peninsula (71°18′S 61°10′W / 71.300°S 61.167°W / -71.300; -61.167) is a high ice-covered peninsula between Palmer Inlet and Lamplugh Inlet on the east coast of Palmer Land, Antarctica. It was mapped by the United States Geological Survey in 1974, and was named by the Advisory Committee on Antarctic Names for Theodore D. Foster, a United States Antarctic Research Program oceanographer on the International Weddell Sea Expedition, 1969. He was party leader on Weddell Sea investigations, 1972–73 and 1974–75.