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See Jefferson County, Kentucky or Jefferson County, West Virginia for further information about places named Jefferson County, Virginia.
Present Jefferson County, Kentucky
In 1792 Virginia ceded western counties to the State of Kentucky.
Jefferson was part of these western counties now in Kentucky.
Present Jefferson County, West Virginia
In 1861 counties in what became West Virginia began seceding from the Confederate State of Virginia. These counties became the State of West Virginia in 1863.
Jefferson was part of these western counties now in West Virginia.