Idylwood is a census-designated place in Fairfax County, Virginia, United States. The population was 17,954 as of the 2020 census. It originally developed as a suburban community along the route of th

George C. Marshall High School is a public school in Idylwood, Fairfax County, Virginia. It has a postal address using "Falls Church" as the city name, and the Falls Church News-Press describes it as