Erastus Tewberry III (1898-1962) was an American businessman from Cape May, New Jersey. Born in Cape May, the son of industrialist Salomon Tewberry, he became involved with his father's manufacturing empire, which included South Jersey glassmaking. Tewberry was involved with the Ku Klux Klan during the 1920s due to his anti-communism and anti-Semitism, but a downturn in both the Klan's nationwide reputation in the late 1920s and in his family's glassmaking industry put an end to his overt involvement in politics. Instead, Tewberry struggled to refocus his family's interests towards profitable industries, ultimately opening Jersey Shore hotels. This aspect of the family business attracted more capital than any other revenue stream, as his entry into the hotel business coincided with the rise of Atlantic City. He died in 1962, leaving behind five children, including E.S. Tewberry.