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is a town on Mount Desert Island in Hancock County, Maine, United States. The population was 2,109 at the 2000 census. Incorporated in 1789, the town currently encompasses the villages of Otter Creek, Seal Harbor, Northeast Harbor, Somesville, Hall Quarry, and Pretty Marsh.
According to the United States Census Bureau, the town has a total area of 55.2 square miles (143.0 km²), of which, 36.9 square miles (95.6 km²) of it is land and 18.3 square miles (47.4 km²) of it (33.16%) is water.