Loudoun Valley Estates is a census-designated place in Loudoun County, Virginia, United States. The population as of the 2010 United States Census was 3,656. It is a Toll Brothers community located near the planned Ashburn Metro station complex and Moorefield Station town center in the southern part of Ashburn, Virginia. Loudoun Valley Estates is governed by a homeowners' association. It was formerly part of the county planning commission's Urban Policy Area but has been removed.