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is a town in Charleston County, South Carolina, United States. The population was 1,250 at the 2000 census. As defined by the U.S. Census Bureau, Seabrook Island is included within the Charleston–North Charleston–Summerville Metropolitan Statistical Area.
According to the United States Census Bureau, the town has a total area of 7.1 square miles (18.4 km²), of which, 6.1 square miles (15.7 km²) of it is land and 1.0 square miles (2.6 km²) of it (14.39%) is water.