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 2018 population of 133,451 ; while its largest city is Charleston with a 2018 population of 136,208 . The Greenville-Anderson-Mauldin metropolitan area is the largest in the state, with a 2018 population estimate of 906,626 .