Grand Manan is a Canadian island in the Bay of Fundy, part of the province of New Brunswick. Grand Manan is also the name of an incorporated village, which includes the main island and numerous nearby islands; White Head Island, small islands near it, and Machias Seal Island are not part of the village.

The Bay of Fundy is a bay between the Canadian provinces of New Brunswick and Nova Scotia, with a small portion touching the U.S. state of Maine. It is an arm of the Gulf of Maine. Its tidal range is the highest in the world. The name is probably a corruption of the French word fendu, meaning 'split'.