Thériault is a surname. Notable people with the surname include:
Bernard Thériault (born 1955), Canadian politician Camille Thériault (born 1955), Canadian politician, former premier of New Brunswick Charles Theriault, Maine politician Denis Thériault (born 1959), Canadian writer Edward Joseph Thériault (1901–1968), Liberal party member of the Senate of Canada Élisée Thériault (1884–1958), lawyer and political figure in Quebec Éric Thériault (born 1967), Canadian cartoonist Gérard Charles Édouard Thériault (1932–1998), Canadian Chief of Defense Staff Guillaume Deschênes-Thériault, Canadian politician Harold Theriault (born 1953), Canadian politician Janine Theriault (born 1975), Canadian actress Jean-Yves Thériault, bassist from Canadian metal group Voivod Jean-Yves Thériault (kickboxer) (born 1955), Canadian kickboxer John Theriault (born 1960), Australian curler Lévite Thériault (1837–1896), landowner and political figure in New Brunswick Lise Thériault (born 1966), Quebec politician Lyn Thériault, formerly known as Lyn Faust, politician in Montreal, Quebec, Canada Mathieu Corbeil-Thériault (born 1991), Canadian ice hockey goaltender Michelle Theriault Boots, American academic and journalist Milaine Thériault (born 1973), Canadian skier Nancy Theriault, American politician Nicole Theriault (born 1972), Thai singer and actress Norbert Thériault (1921–2016), Canadian politician Paul Thériault, Canadian politician, former leader of the Yukon Liberal Party Roch Thériault (1947–2011), Canadian religious leader Sean Theriault (born 1972), American professor Serge Thériault (born 1948), Quebec comedian and actor Yves Thériault (1915–1983), Canadian author
Other uses École Secondaire catholique Thériault, Canadian high school in Timmins, Ontario A. F. Theriault Shipyard, a ship yard and boatbuilder in Meteghan River, Nova Scotia