The Potomac Highlands of West Virginia (or Potomac Highlands) centers on five counties (Grant, Hampshire, Hardy, Mineral, and Pendleton) in the upper Potomac River watershed in the western portion of the state's Eastern Panhandle, bordering Maryland and Virginia. Because of geographical proximity, similar topography and landscapes, and shared culture and history, the Potomac Highlands region also includes Pocahontas, Randolph, and Tucker counties, even though they are in the Monongahela River or New River watersheds and not that of the Potomac River.