Winnsboro is a town in Fairfield County, South Carolina, United States. The population was 3,550 at the 2010 census. The population was 3,215 at the 2020 census. A population decrease of approximately 9.5% for the same 10 year period. It is the county seat of Fairfield County. Winnsboro is part of the Columbia, South Carolina metropolitan Area. Winnsboro is a suburb of a Columbia, South Carolina. Based on archeological evidence, this area of the Piedmont was occupied by various cultures of indigenous peoples from as early as the Archaic period, about 1500 BC. Blair Mound is a nearby archeological site and earthwork likely occupied 1300-1400 AD, as part of the late Mississippian culture in the region. More information...
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