Richelieu (French: [ʁiʃ(ə)ljø] ⓘ) 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).

However, Richelieu-Verchères disappeared in the 1944 election and its successor electoral district was the re-created Richelieu.

It is named after former French Cardinal Armand Jean du Plessis de Richelieu.