Charles Town is a city in Jefferson County, West Virginia, United States, and is also the county seat. The population was 5,259 at the 2010 census. It is named for its founder Charles Washington, youngest brother of President George Washington.
"Charlestown" was established by an act of the Virginia General Assembly in January 1787. However, for about two decades, confusion arose because the same name was also used for a town established in Ohio County at the mouth of Buffalo Creek, and authorized in the 1791 term of that local court. That area in 1797 became known as Brooke County, with that "Charlestown" as its county seat until a December 27, 1816 act of the Virginia General Assembly changed its name to Wellsburg, to honor a trader and his son.
Charles Washington, the founder of Charles Town, was born in Hunting Creek, now Fairfax County, Virginia, on May 2, 1738. He was the youngest full brother of George Washington. He came to what is today Jefferson County between April and October 1780. The estate of Charles Washington, Happy Retreat, was erected in 1780. In 1786, on 80 acres (320,000 m2) of his adjoining land, Charles laid out the streets of Charles Town, naming many of them after his brothers and one after his wife, Mildred.