Jefferson County, Ohio

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Jefferson County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 69,709. Its county seat is Steubenville. The county is named for Thomas Jefferson, who was vice president at the time of its creation.

Brooke County, West Virginia Hancock County, West Virginia Harrison County, Ohio Ohio County, West Virginia Carroll County, Ohio Columbiana County, Ohio Belmont County, Ohio Washington County, Pennsylvania Beaver County, Pennsylvania Marshall County, West Virginia


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