Southgate is a surname. Notable people with the surname include:
Elsie Southgate (1890–1946), British violinist
Gareth Southgate (born 1970), English footballer and manager
Horatio Southgate (1812–1894), American Episcopal priest
Hugh McLellan Southgate (1871–1940), of Washington, D.C.
Ivan Southgate, former name of Terri Rogers (1937–1999), English ventriloquist
Jan Southgate (born 1955), English cricketer
John Southgate (1926–1999), English clergyman
Martha Southgate, American novelist
Richard Southgate (politician) (1774–1857), American attorney and politician
Richard Southgate (actor) (born 1990), British actor
Richard Southgate (clergyman) (1729–1795), English clergyman and numismatist
Tony Southgate, racing car designer
Troy Southgate, British musician and political activist
William Southgate, New Zealand conductor and composer
William Wright Southgate (1800–1849), American politician
