Saint-Mathieu-de-Beloeil is a municipality in southwestern Quebec, Canada, east of Montreal in the Regional County Municipality of La Vallée-du-Richelieu. The population as of the 2021 Canadian Census was 2,952. Demographics Population Population trend: Language Mother tongue language (2021) Education The South Shore Protestant Regional School Board previously served the municipality. See also List of municipalities in Quebec References Municipalities in Quebec Incorporated places in La Vallée-du-Richelieu Regional County Municipality Greater Montreal