Fairfax High School is a public high school in the Eastern United States, located in Fairfax, Virginia, a suburb west of Washington, D.C. in Northern Virginia. The school is owned by the City of Fairfax, but is operated by Fairfax County Public Schools under a contractual agreement between it and Fairfax County.

Fairfax, Virginia, formally the City of Fairfax, and colloquially known as Fairfax City, Downtown Fairfax, Old Town Fairfax, Fairfax Courthouse, FFX, and Fairfax, is an independent city in Virginia and the county seat of Fairfax County, Virginia, in the United States. As of the 2020 census, the population was 24,146.