Green Island is an undeveloped island in the West Isles Parish of Charlotte County, New Brunswick, Canada, where the Bay of Fundy enters Passamaquoddy Bay. Remainder of parish on mapbooks 490, 497, 500, and 501 at same site.

It was one of five islands dismissed by author Abraham Gesner in 1847 as "small eminences of little importance".

In the summer of 1986, benthic algae sublittoral research stations were set up across the region including on Green Island.A Survey of the Benthic Marine Algae of Southwestern New Brunswick, Canada, 1988

In 1832, commissioner of Crown Lands Thomas Baillie wrote that the island had "very little value".

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