Dunnett is a surname. Notable people with the surname include:
Sir Alastair Dunnett (1908–1998), Scottish journalist and newspaper editor, husband of Dorothy DunnettCharles Dunnett (1921-2007), Canadian statisticianDorothy Dunnett (1923–2001), Scottish historical novelist, wife of Alastair DunnettJack Dunnett (born 1922), British politicianStephen Dunnett (born 1950), British neuroscientist