Berkeley County, West Virginia

Berkeley County is in the Eastern Panhandle region of West Virginia in the United States. The county is part of the Hagerstown-Martinsburg, MD-WV Metropolitan Statistical Area.As of the 2010 census, the county population was 104,169, making it the second-most populous of West Virginia's 55 counties, behind Kanawha. The City of Martinsburg is the county seat.HistoryCreated on May 15, 1772 by an act of House of Burgesses from the northern third of Frederick County when it was part of Virginia, Berkeley County became West Virginia's second oldest county after the Mountain State was admitted to the Union in 1863 during the American Civil War. At the time of the county's formation, Berkeley County comprised areas that now are part of present-day Jefferson and Morgan counties in West Virginia.