Summary
Chantilly High is a large comprehensive public high school in Chantilly, Virginia, serving 2,937 students in grades 9–12 as part of Fairfax County Public Schools. The school currently ranks 49th out of 331 Virginia high schools (85th percentile), placing it among the stronger high schools in Northern Virginia and ahead of many nearby FCPS peers.
Academically, Chantilly shines in 9th-grade SOL exams, with proficiency rates well above district and state averages in Geometry (96.7%), Algebra I (93.4%), and Biology (96.9%). Tenth-grade Chemistry proficiency (86.4%) dramatically exceeds both the district (55.6%) and state (60.8%). These strengths outpace several neighboring schools, including Fairfax High, Centreville High, and Westfield High. Chantilly also posts a strong 96.0% graduation rate and a low 2.7% dropout rate, along with a favorable 12.8:1 student-teacher ratio and per-pupil spending of $12,639. It trails only Madison High and Oakton High among immediate FCPS peers, while Freedom High in Loudoun County outperforms it on most headline metrics.
Despite these strengths, some areas need attention. Twelfth-grade Reading proficiency (50%) and Earth Science proficiency (50%) lag state averages, and students who take or retake core assessments later in high school appear to need more support. Chronic absenteeism, while improved to 14.6%, remains above the district average of 11.9%. The school also has room to raise outcomes for economically disadvantaged, Hispanic, and English learner students, though Hispanic student rankings improved dramatically in the past year. With a post-pandemic rebound back to its pre-2020 percentile, strong advanced course performance, and a high graduation rate, Chantilly is well-positioned to continue climbing toward the top tier of Virginia high schools.
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