Falls Church High School (FCHS) is a high school located in West Falls Church, Virginia, in unincorporated Fairfax County. While the school has a Falls Church mailing address, the school does not serve the City of Falls Church, which is served by Meridian High School. The school serves grades 9 through 12. It was relocated from its former site in downtown Falls Church to the current address, 7521 Jaguar Trail, Falls Church, Virginia 22042, in 1967. Falls Church High's school motto is "Building on Our Success." The mascot for the school is a Jaguar. The school colors are dark green and white. The principal is Benjamin Nowak.

West Falls Church is a census-designated place (CDP) in Fairfax County, Virginia, United States. The population was 29,207 at the 2010 census. Before 2010, West Falls Church was officially named Jefferson. Outside of the Jefferson Village neighborhood, "Jefferson" generally is not used locally to refer to the area bounding Falls Church city to the south and southwest that comprises the CDP. Likewise, "West Falls Church" is rarely used to describe the area but is usually applied to areas west of Falls Church city or near West Falls Church Metro station. The bulk of it is made of subdivisions built in the 1940s and early 1950s, including Jefferson Village, Westlawn, Hillwood, Sleepy Hollow, Woodley, Raymondale and Broyhill Park.