Summary:
Zip code 20147 in Ashburn, Virginia is served by two public high schools—Stone Bridge High and Broad Run High—both part of Loudoun County Public Schools, serving grades 9-12 with a combined enrollment of roughly 3,187 students.
Stone Bridge High is the clear standout in this area. It ranks #35 out of 331 Virginia high schools (89th percentile) with a 4-star rating, a 99.0% graduation rate, and a 0.4% dropout rate—both far better than the state averages of 92.3% and 5.0%. Its average SOL proficiency across all listed tests is about 84.6%, with perfect or near-perfect scores in 10th-grade Chemistry and 9th-grade Biology. Broad Run High is also a strong school, ranking #104 (69th percentile) with 3 stars, a 97.7% graduation rate, and a 1.2% dropout rate. However, it trails Stone Bridge on most academic measures, with average SOL proficiency around 79.2%. Broad Run spends $1,373 more per student ($18,705 vs. $17,332) and has a slightly lower student-teacher ratio, yet Stone Bridge still posts higher rankings, test scores, and graduation outcomes—suggesting that spending alone doesn't drive results. Broad Run also has a higher free/reduced lunch rate (30.4% vs. 20.1%), which likely contributes to the achievement gap.
Both schools are improving: Stone Bridge jumped from #46 to #35 in the latest rankings, while Broad Run moved from #127 to #104. They share a common strength in advanced science and math—both exceed 90% proficiency in Chemistry and 9th-grade Algebra II. The biggest concern is chronic absenteeism: 20.3% at Stone Bridge and 16.4% at Broad Run, both above the state average of 14.8%. This is surprising given their strong graduation rates, but it may be a hidden issue to watch. For parents, this area offers two very solid public high schools with excellent graduation outcomes, with Stone Bridge leading on academics and Broad Run holding its own—especially in science—while both would benefit from addressing absenteeism.
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