Gerald Sandford Graham (born 27 April 1903 in Sudbury, Ontario - died 5 July 1988 St Leonards-on-Sea, East Sussex) was Rhodes Professor of Imperial History at King's College London from 1949 until his retirement in 1970. He earned a world reputation for his series of in-depth studies of the interrelationship between sea power and the development of the British empire. In 1929, Graham married Winifred Emily Ware (1907–1990), with whom he had a son. They divorced in 1950 and he married Constance Mary Greey, with whom he had two daughters and a son.