L'île Sainte-Marie (English: Sainte-Marie Island) is a river island of the Richelieu River. It is located in the territory of the municipality of Carignan, in the La Vallée-du-Richelieu Regional County Municipality, in the administrative region from Montérégie, in the south of province of Quebec, to Canada.
ÃÂle Sainte-Marie is located downstream from Sainte-Thérèse Island, from which it is separated by a narrow channel.
Very elongated in shape, ÃÂle Sainte-Marie measures in length by of maximum width. It is connected to the left bank of the Richelieu River by a road which passes over the pier forming the right bank of the Chambly Canal.
ÃÂle Sainte-Marie faces east from the confluence of La Grande Décharge (stream coming from the east); at this location, the distance between the island and the east bank of the Richelieu River is . ÃÂle Sainte-Marie also faces the Chambly Canal National Historic Site of Canada, which is located on the west side of the canal.
Quebec historians generally locate the old fort Sainte Thérèse, which has disappeared today, opposite ÃÂle Sainte-Marie.
The name of island comes from that of a former owner, Jean Sainte-Marie.
The toponym "ÃÂle Sainte-Marie" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.
Formerly an agricultural territory, ÃÂle Sainte-Marie is now occupied by around thirty residences. The "Rue de l'ÃÂle-Sainte-Marie" is the main road on the island.