Winnsboro's
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Winnsboro is a town in Fairfield County, South Carolina, United States. Its population was 3,550 at the 2010 census. The population was 3,215 at the 2020 census, a population decrease around 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 aream as well as a suburb of Columbia.