Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. WAshington County is a county located in the Commonwealth of Virginia. AS of the 2000 census, the population was 51,103. ITs county seat is Abingdon.WAshington County is part of the Kingsport Bristol (TN) Bristol (VA) Metropolitan Statistical Area, which is a component of the Johnson City Kingsport Bristol, TN-VA Combined Statistical Area commonly known as the "Tri-Cities" region.THe county was formed in 1776 from Fincastle County. IT was named for George Washington, who was then commander-in-chief of the Continental Army. WAshington County has the distinction of being the first geographical region to be named after the president of the United States.IN 1786 the northwestern part of Washington County became Russell County.