 Most of the county's streams drain into the Appomattox River, a tributary of the James River, but in the southeastern corner of the county, streams drain via the Nottoway River into the Chowan River and thence into Albemarle Sound in North Carolina.The highest point in the county is the top of Leighs Mountain at 714 feet above sea level.As of the census of 2000, there were 19,720 people, 6,561 households, and 4,271 families residing in the county.