Amsterdam is a village in northwestern Jefferson County, Ohio, United States. The population was 436 at the 2020 census. The community was founded by Dutch immigrant David Johnson and named after the city of Amsterdam, Netherlands. It is part of the Weirton–Steubenville metropolitan area.

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.