Deschaillons-sur-Saint-Laurent is a province of Québec municipality in Canada that is part of the regional county municipalities of Bécancour and the administrative region of Centre-du-Québec. Overlooking the St. Lawrence River from the south shore, along Route 132, the municipality has just under one thousand inhabitants. Deschaillons-sur-Saint-Laurent is 55 kilometres east of Trois-Rivières and 85 kilometres west of Quebec City.