Wintersville is a village in central Jefferson County, Ohio, United States. The population was 3,609 as of the 2020 Census. It is part of the Weirton–Steubenville metropolitan area. The village is suburban in nature and is governed by a mayor and council elected by non-partisan ballot.

Jefferson County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 65,249. Its county seat is Steubenville. The county is named for Thomas Jefferson, who was vice president at the time of its creation.