According to the National Association of Counties that is Highland County, located on the border with West Virginia, at 2,536 people.
Randolph County, West Virginia
yes. Hancock county is in deed the smallest. However Randolph is the biggest.
Loudoun and Fairfax Counties are always neck and neck. In 2010 Loudoun County came in first.
Buckingham, the place in Buckingham County, Virginia, USA