Yorktown is a census-designated place in York County, Virginia, United States. It is the county seat of York County, one of the eight original shires formed in colonial Virginia in 1682. Yorktown's population was 195 as of the 2010 census, while York County's population was 66,134 in the 2011 census estimate.The town is most famous as the site of the siege and subsequent surrender of General Charles Cornwallis to General George Washington and the French Fleet during the American Revolutionary War on October 19, 1781. Although the war would last for another year, this British defeat at Yorktown effectively ended the war. Yorktown also figured prominently in the American Civil War, serving as a major port to supply both northern and southern towns, depending upon who held Yorktown at the time.Today, Yorktown is one of three sites of the Historic Triangle, which also includes Jamestown and Williamsburg as important colonial-era settlements.