Summary:
Zip code 20165 contains one high school — Potomac Falls High — which serves grades 9–12 and enrolls 1,662 students in the Potomac Falls area of Loudoun County, Virginia. As the only high school in the zip code, all comparisons are made against district and state averages rather than local peers. The school is part of Loudoun County Public Schools, a highly regarded district ranked 18th out of 131 in Virginia with a 4-star rating. Potomac Falls High itself holds a 2025–2026 state rank of 177 out of 331 schools (47th percentile, 2 stars), a slight dip from the 3-star ratings it earned in the two previous school years.
Potomac Falls High shows clear strengths in several areas. Its graduation rate stands at 94.9%, above the state average of 92.3%, and its dropout rate of 3.1% is well below the state's 5.0%. Academically, the school shines in 10th-grade Chemistry, where 100% of students scored proficient on the SOL exam compared to just 60.8% statewide. Upper-grade Algebra I results are also impressive, with 11th and 12th graders posting proficiency rates of 94.1% and 93.3%, respectively. Tenth-grade Earth Science proficiency (63.6%) also exceeds both district and state averages. The school is well-resourced, with a student-teacher ratio of 11.9 and per-pupil spending of $17,611.
However, there are areas of concern. Eleventh-grade Biology proficiency was just 58.8% in 2025–2026, well below the district's 75.3% and the state's 63.5%. Ninth-grade Algebra I proficiency (77.4%) trails the district (87.8%) and state (80.2%). English Reading results in 12th grade have been volatile, swinging from 53.3% proficiency in 2024–2025 to 82.5% in 2025–2026. Nearly 38% of students qualify for free or reduced lunch, and chronic absenteeism (14.6%) is slightly above the district rate. Overall, Potomac Falls High is a solid mid-tier school with notable academic strengths, but it lags its high-performing district in several metrics and has room for targeted improvement.
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