Mount Pleasant is a large suburban town in Charleston County, South Carolina, United States. It is a member of the CharlestonNorth CharlestonSummerville Metropolitan Statistical Area, for statistical purpose only, as designated by the U.S. Office of Management and Budget. (OMB) . It is the fifth largest municipality in South Carolina, and for several years it was one of the state's fastest growing areas, literally doubling in population size between 1990 and 2000. The population was 67,843 at the 2010 census. Mount Pleasant is included within the Charleston-North Charleston Urbanized Area and is the 3rd largest municipality in this metro behind Charleston and North Charleston. At the foot of the Arthur Ravenel Bridge is Patriot's Point, a naval and maritime museum, home to the World War II aircraft carrier USS Yorktown, which is now a museum ship. The Ravenel Bridge, an eight lane highway that was completed in 2005, spans the Cooper River and links Mount Pleasant with downtown Charleston.