Reston is a census-designated place in Fairfax County, Virginia, United States, and a principal city of the Washington metropolitan area. As of the 2020 U.S. Census, Reston's population was 63,226.Founded in 1964, Reston was influenced by the Garden City movement that emphasized planned, self-contained communities that intermingled green space, residential neighborhoods, and commercial development. The intent of Reston's founder, Robert E.