South Carolina is a state in the southeastern region of the United States of America. The Province of South Carolina was one of the 13 colonies that revolted against British rule in the American Revolution. It was the first state to secede from the Union to found the Confederate States of America. The state is named after King Charles II of England, as Carolus is Latin for Charles. According to 2005 estimates by the U.S. Census Bureau, the state's population is 4,321,249.