Dolphin is a surname. Notable people with the surname include:
Arthur Dolphin (1885–1942), English first-class cricketer Bill Dolphin (1881–1969), Australian rules footballer Charles B. Dolphin (1888–1969), British-Canadian architect David Dolphin (born 1940), Canadian biochemist David Dolphin (cricketer) (born 1950), Zimbabwean cricketer Frank Dolphin (born 1959), Irish businessman James Dolphin (born 1983), New Zealand sprinter John Dolphin (disambiguation), several people Tom Dolphin (born 1978/9), British anaesthetist