Webster County is a county located in center of the U.S. state of Mississippi, bordered on the south by the Big Black River. As of the 2020 census, the population was 9,926. The county was organized in 1874 during the Reconstruction era; the biracial legislature named it after Massachusetts statesman Daniel Webster. Its county seat is Walthall, designated in 1876. After the repeal of Prohibition in 1933, Webster County voters established this as a "dry county."