South Carolina (/ˌkærəˈlaɪnə/ ) is a state in the coastal Southeastern region of the United States. It is bordered to the north by North Carolina, to the southeast by the Atlantic Ocean, and to the southwest by Georgia across the Savannah River. South Carolina is the 40th most extensive and 23rd most populous U.S. state with a recorded population of 5,124,712 according to the 2020 census. In 2019, its GDP was $213.45 billion. South Carolina is composed of 46 counties. The capital is Columbia with a population of 137,300 in 2020; while its largest city is Charleston with a 2020 population of 150,277. The Greenville–Spartanburg-Anderson metropolitan area is the most populous in the state, with a 2020 population estimate of 1,455,892. Within South Carolina from east to west are three main geographic regions, the Atlantic coastal plain, the Piedmont, and the Blue Ridge Mountains in the northwestern corner of Upstate South Carolina. South Carolina has primarily a humid subtropical climate, with hot humid summers and mild winters. Areas in the Upstate have a subtropical highland climate. Along South Carolina's eastern coastal plain are many salt marshes and estuaries. South Carolina's southeastern Lowcountry contains portions of the Sea Islands, a chain of barrier islands along the Atlantic Ocean. (Source: Wikipedia.org, CC BY-SA)