The Minas Basin is an inlet of the Bay of Fundy and a sub-basin of the Fundy Basin located in Nova Scotia, Canada. It is known for its extremely high tides.
The Minas Basin forms the eastern part of the Bay of Fundy which splits at Cape Chignecto and is delineated by the massive basalt headlands of Cape Split and Cape d'Or. The Minas Basin is split into four sections: Cobequid Bay, from the mouth of the Salmon River to a narrow point between Economy and the Noel Shore; Central Minas Basin, from the mouth of Cobequid Bay to the narrow point between Parrsboro and Cape Blomidon; the Southern Bight, from the mouth of the Avon River to the narrow point between Cape Blomidon and the Noel Shore; and the Minas Channel, from Central Minas Basin to the narrow line between Cape Chignecto and the Annapolis Valley Shore.
Several important rivers in Nova Scotia drain into the Minas Basin: Shubenacadie River, Cornwallis River, Avon River, Gaspereau River, and the Salmon River. Lesser rivers include the Canard River, Diligent River, Farrell River, and Debert River.
Along the northern edge of the Minas Basin lies a chain of intermittent high-cliffed basaltic bluffs and islands called the Basalt Headlands.