Richelieu is a provincial electoral riding in the Montérégie region of Quebec, Canada, which elects members to the National Assembly of Quebec. It notably includes the municipalities of Sorel-Tracy, Sainte-Anne-de-Sorel, Saint-Roch-de-Richelieu and Sainte-Victoire-de-Sorel. It was created for the 1867 election (and an electoral district of that name existed earlier in the Legislative Assembly of the Province of Canada and the Legislative Assembly of Lower Canada). Its final election was in 1936. It disappeared in the 1939 election and its successor electoral district was Richelieu-Verchères.