Winston-Salem is a city in and the county seat of Forsyth County, North Carolina, United States. With a 2018 estimated population of 246,328 it is the second largest municipality in the Piedmont Triad region, the fifth most populous city in North Carolina, the third largest urban area in North Carolina, and the eighty-ninth most populous city in the United States. With a metropolitan population of 676,673 it is the fourth largest metropolitan area in North Carolina. Winston-Salem is home to the tallest office building in the region, 100 North Main Street, formerly the Wachovia Building and now known locally as the Wells Fargo Center.