Simon Lavoie (born May 15, 1979) is a Canadian film director and screenwriter from Quebec. He is best known as codirector with Mathieu Denis of Those Who Make Revolution Halfway Only Dig Their Own Graves (Ceux qui font les révolutions à moitié n'ont fait que se creuser un tombeau), which won the award for Best Canadian Film at the 2016 Toronto International Film Festival and garnered several Canadian Screen Award nominations at the 5th Canadian Screen Awards in 2017, including for Best Picture and Best Director.
He made a number of short films — including Une chapelle blanche, which won the Prix Jutra for Best Short Film in 2006 — before making his feature film debut in 2008 with Le déserteur. He first collaborated with Denis on the 2011 film Laurentie, and followed up with Le Torrent in 2012.
His next project, a film adaptation of Gaétan Soucy's novel The Little Girl Who Was Too Fond of Matches (La petite fille qui aimait trop les allumettes), is slated for release in 2017.