Denis Thériault (born August 24, 1959) is a Canadian author, playwright, and screenwriter of French-Canadian descent.
After winning the Télé-Québec Scenarios Competition twice with Aïrenem (1983), and then Victor le vampire (1984), he began a career as a screenwriter.
Thériault contributed in the writing of several television series including La maison Deschênes (1987–88), Macaroni tout garni (2001 to 2005), Kaboum (2006 to 2010), Les argonautes (2011 to 2013).
Thériault published his first novel in 2001, L'iguane (The Boy Who Belonged to the Sea), which won four literary awards.
He has since published Le facteur émotif (Canada-Japan Prize), La fille qui n’existait pas, La fiancée du facteur, and Manucure.