Winfield is a town in Putnam County, West Virginia, along the Kanawha River. The population was 2,301 at the 2010 census. It is the county seat of Putnam County. Winfield was established on a 400-acre (160 ha) tract of land owned by Charles Brown. He established a ferry across the river in 1818. The first meeting of the county court was held at the home of Talleyrand P. Brown, in Winfield, on May 22, 1848.