Hey is a surname. Notable people with the surname include:
Dale Hey (1947–2012), Canadian-born American professional wrestler better known as Buddy Roberts David Hey (1938–2016), English historian Donald Holroyde Hey (1904–1987), British organic chemist Jerry Hey (born 1950), American musician Jonathan Hey (born 1979), information scientist Tony Hey (born 1946), British computer scientist Vic Hey (1912–1995), Australian rugby league footballer Virginia Hey (born 1952), Australian actress William Hey (surgeon) (1736–1819), English surgeon