The town of Bécancour was created October 17, 1965, from an amalgamation of eleven municipalities. Bécancour was one of the province of Quebec's first amalgamated cities.[4] At the time, Bécancour was the largest city in Quebec in terms of land area (as of 2003, the title belongs to La Tuque, Quebec).
Bécancour is now divided into six secteurs (lit. "sectors"): Bécancour, Saint-Grégoire, Gentilly, Précieux-Sang, Sainte-Angèle-de-Laval, and Sainte-Gertrude. Bécancour, Saint-Grégoire and Gentilly, each located near the shore of the Saint Lawrence River, can be considered the main urban centres. Autoroute 55 intersects Autoroute 30 and Route 132 at Saint-Grégoire.
Bécancour is part of the Trois-Rivières metropolitan area; many residents work in Trois-Rivières and commute across the Laviolette Bridge daily. The economy of Bécancour, once mainly agricultural, shifted towards heavy industry and manufacturing in the 1970s and 1980s. An industrial park was built in the area, attracting producers of aluminum, magnesium, refractory metals, and petroleum products; machine shops; and many related services, such as excavators and sales of industrial parts. A nuclear power plant, Gentilly Nuclear Generating Station, was commissioned in 1983 in the Gentilly sector; it was decommissioned in 2012.[5]
Despite its proximity to Trois-Rivières, Bécancour has a vibrant culture and identity of its own. The city hosts a hot air balloon festival,[6] a weekly public marketplace, a biodiversity museum and interpretation centre, and a maritime pumpkin race.[7]
In the 2021 Census of Population conducted by Statistics Canada, Bécancour had a population of 13,561 living in 6,034 of its 6,348 total private dwellings, a change of 4.1% from its 2016 population of 13,031. With a land area of 439.54 km2 (169.71 sq mi), it had a population density of 30.9/km2 (79.9/sq mi) in 2021.[8]