Doust is an English-language surname. Notable people with the surname include:
Kate Doust (born 1962), Australian politician Jon Doust, Australian comedian, writer, novelist and professional speaker from Western Australia Matt Doust (1984–2013), American-born Australian hyper-realistic artist Dudley Doust (1930–2008), American sportswriter Russell Doust (1927–2025), Australian librarian Stanley Doust (1879–1961), Australian tennis player
See also Sentenac-d'Oust, commune in the Ariège department in south-western France Heber Doust Curtis (1872–1942), American astronomer