Marion is a city in Marion County, South Carolina, United States. The population was 7,042 at the 2000 census. It is the county seat of Marion County. It is named for Francis Marion, a Brigadier General from South Carolina in the American Revolutionary War.
Marion is located at 34°10′48″N 79°23′50″W / 34.18°N 79.39722°W / 34.18; -79.39722 (34.180088, -79.397098).
According to the United States Census Bureau, the city has a total area of 4.3 square miles (11.2 km²), all of it land.