Southgate is a surname. Notable people with the surname include:
Elsie Southgate (1890–1946), British violinistGareth Southgate (born 1970), English footballer and managerHoratio Southgate (1812–1894), American Episcopal priestHugh McLellan Southgate (1871–1940), of Washington, D.C.Ivan Southgate, former name of Terri Rogers (1937–1999), English ventriloquistJan Southgate (born 1955), English cricketerJohn Southgate (1926–1999), English clergymanMartha Southgate, American novelistRichard Southgate (politician) (1774–1857), American attorney and politicianRichard Southgate (actor) (born 1990), British actorRichard Southgate (clergyman) (1729–1795), English clergyman and numismatistTony Southgate, racing car designerTroy Southgate, British musician and political activistWilliam Southgate, New Zealand conductor and composerWilliam Wright Southgate (1800–1849), American politician