Winnsboro is a town in Fairfield County, South Carolina, United States. The population was 3,550 at the 2010 census. It is the county seat of Fairfield County. Winnsboro is part of the Columbia, South Carolina Metropolitan Statistical Area.
Winnsboro is located east of the center of Fairfield County at 34°22′37″N 81°5′17″W (34.377069, -81.087959). U.S. Route 321 and South Carolina Highway 34 bypass the town on the west side. US 321 Business passes through the center of town on Congress Street. US 321 leads north 25 miles (40 km) to Chester and south 28 miles (45 km) to Columbia. SC 34 leads southeast 11 miles (18 km) to Ridgeway and west 36 miles (58 km) to Newberry. SC 200 leads northeast 19 miles (31 km) to Great Falls. The unincorporated community of Winnsboro Mills borders the south side of Winnsboro. According to the United States Census Bureau, the town of Winnsboro has a total area of 3.2 square miles (8.4 km²), all land.
As of the census of 2000, there were 3,564 people, 1,454 households, and 984 families residing in the town. The population density was 1,109.6 people per square mile (428.9/km²). There were 1,597 housing units at an average density of 492.4 per square mile (190.3/km²). The racial makeup of the town was 40.29% White, 58.46% African American, 0.31% Asian, 0.33% from other races, and 0.61% from two or more races. Hispanic or Latino of any race were 1.31% of the population.
There were 1,454 households out of which 33.2% had children under the age of 18 living with them, 37.7% were married couples living together, 25.4% had a female householder with no husband present, and 32.3% were non-families. 29.7% of all households were made up of individuals and 14.0% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 3.04.
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