South Carolina is a state in the southeastern region of the United States. The state is bordered to the north by North Carolina, to the south and west by Georgia, across the Savannah River, and to the east by the Atlantic Ocean.South Carolina became the eighth state to ratify the U.S. Constitution, on May 23, 1788. South Carolina became the first state which voted to secede from the Union on December 20, 1860. After the American Civil War, it was readmitted into the United States on June 25, 1868.South Carolina is the 40th most extensive and 23rd most populous U.S. state. Its GDP as of 2013 was $183.6 billion, with an annual growth rate of 3.13%. South Carolina is composed of 46 counties. The capital is Columbia with a 2016 population of 134,309; while its largest city is Charleston with a 2016 population of 134,385. The Greenville-Anderson-Mauldin metropolitan area is the largest in the state, with a 2016 population estimate of 884,975.