Gulf of Saint Lawrence (French: golfe du Saint-Laurent), the world's largest estuary, is the outlet of North America's Great Lakes via the Saint Lawrence River into the Atlantic Ocean.
The river flows into the gulf through the Jacques Cartier Strait between the Côte-Nord region of Quebec and the north shore of Anticosti Island, and the Honguedo Strait between the south shore of Anticosti Island and the Gaspé Peninsula.
The gulf is bounded on the north by the Labrador Peninsula, to the east by Newfoundland, to the south by the Nova Scotia peninsula and Cape Breton Island, and to the west by the Gaspé and New Brunswick. It contains Anticosti Island, Prince Edward Island, and the Magdalen Islands.
Besides the Saint Lawrence River itself, semi-major tributaries of the Gulf of Saint Lawrence include the Miramichi River, the Natashquan River, the Restigouche River, the Margaree River, and the Humber River. Arms of the Gulf include the Chaleur Bay, Miramichi Bay, St. George's Bay, Bay of Islands, and Northumberland Strait.
