Sorel-Tracy (/sɔːˈrɛl træˈsiː/; French: [sɔʁɛl tʁaˈsi]) is a city in southwestern Quebec, Canada and the geographical end point of the Champlain Valley. It is located at the confluence of the Richelieu River and the St. Lawrence River, on the western edge of Lac Saint-Pierre, downstream and northeast of Montreal. The population as of the Canada 2021 Census was 35,165. Its mayor is Patrick Péloquin and it is the seat of the Pierre-De Saurel Regional County Municipality and the judicial district of Richelieu.
The city is the result of a voluntary merger in March 2000 between two former municipalities, Sorel and Tracy, which developed on opposite shores of the Richelieu River: Tracy on the west shore and Sorel on the east shore. Sorel itself had annexed in 1992 the municipality of Saint-Pierre-de-Sorel; today it forms the southern part of its territory.