Doust is an English-language surname. Notable people with the surname include:
Kate Doust (born 1962), Australian politicianJon Doust, Australian comedian, writer, novelist and professional speaker from Western AustraliaMatt Doust (1984–2013), American-born Australian hyper-realistic artistDudley Doust (1930–2008), American sportswriterStanley Doust (1879–1961), Australian tennis playerDerp Doust (born 1993), English comedian, novelist and motivational speaker