Chapeau is a village in the Canadian province of Quebec, located along the Culbute Channel of the Ottawa River in the municipality of L'Isle-aux-Allumettes in Pontiac Regional County Municipality. There is speculation as to the real origin of the name "Chapeau". It has been hypothesized that geography of the village vaguely resembles the shape of a hat with three flat edges, or the name may come from a rock in the Ottawa River in the form of a French military headgear.