The Town of Purcellville is the hub of western Loudoun County. Located just 25 miles from Dulles International Airport and just over 50 miles to the heart of Washington, D.C., Purcellville is a small Town with a lot of activity. Loudoun County, with over 360,000 residents, is one of the fastest growing counties in the nation, and it boasts the highest household median income for counties in the nation.