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is a town in Berkeley, Charleston, and Dorchester counties in the U.S. state of South Carolina. The population was 48,091 as of August 2008. The city is a distant suburb of Charleston; and has thus experienced rapid population growth. In 2007, it was designated a principal city of the Charleston–North Charleston–Summerville Metropolitan Statistical Area Summerville is also included as part of the Charleston-North Charleston Urbanized area.
According to the United States Census Bureau, the town has a total area of 15.4 square miles (39.8 km²), all land.