Steubenville is the county seat for Jefferson County
Smithfield is in Jefferson County
Jefferson County(96) ► ADJACENT TO JEFFERSON COUNTY Belmont County(77) ► Carroll County(25) ► Columbiana County(108) ► Harrison County(42) ► Brooke County, West Virginia(47) ► Hancock County, West Virginia(28) ► Ohio County, West Virginia(176) ►
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