Mount Pleasant is a village in southern Jefferson County, Ohio, United States. The population was 394 at the 2020 census. It is part of the Weirton–Steubenville metropolitan area. Founded in 1803 by anti-slavery Quakers, the village was an early center of abolitionist activity and a well-known haven for fugitive slaves on the Underground Railroad.

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.