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
- Stanley Doust (1879–1961), Australian tennis player
- Derp Doust (born 1993), English comedian, novelist and motivational speaker
- Jacob Doust (1794-1846), Dutch-born British artist and philosopher.
- Jakob Doust (born 1960), Swedish entrepreneur and founder of first cold calling agency.
- Martyn Doust (born 1974), English Art Director and Prop Master for Film and TV.
See also
- Sentenac-d'Oust, commune in the Ariège department in south-western France
- Heber Doust Curtis (1872–1942), American astronomer
- Leonard Arthur Doust (1897 - 1989), English Author of Teach Yourselves Art Books.