Summary
Belmont High is a grade 9–12 public school in Belmont, MA, serving 1,454 students as part of the Belmont district. In 2025–2026, it ranked 4th of 353 Massachusetts high schools, placing it in the 99th percentile with 5 stars, and it has earned 5 stars in every listed year and never ranked lower than 27th. For 2024–2025, its graduation rate was 97.5% and its dropout rate was 0.0%, following several years of 97–99% graduation.
In 2025–2026 10th grade MCAS, Belmont High’s proficiency was 84.05% in ELA, 87.00% in Math, 88.67% in Science, and 86.39% in Physics—roughly double the state’s 45.48%, 43.73%, 40.50%, and 46.58%. It outperformed its closest high-performing neighbor, Arlington High, in every listed subject by +5.86 points in ELA, +4.04 in Math, +15.05 in Science, and +6.39 in Physics. It also scored far above Cambridge Rindge and Latin, Watertown High, Medford High, and Waltham Senior High.
Subgroup results are strong across the board: special education students rank 6th of 298 (98th percentile), and low-income students rank 41st of 340 (88th percentile). The school also appears unusually efficient. Among nearby schools with reported 2020–2021 spending, Belmont High had the lowest per-student spending ($15,483) and the highest student-teacher ratio (15.7), yet produced stronger outcomes than schools such as Arlington High ($16,663; 13.6), Watertown High ($23,661; 11.0), Medford High ($21,744; 9.1), and Cambridge Rindge and Latin ($32,729; 9.2). Spending data are from 2020–2021 and student-teacher ratios are not class sizes, so this is a comparative signal, not a simple explanation. Nearby schools fall into tiers: Arlington is the closest peer, Cambridge and Watertown are mid-tier regionally, while other nearby schools are lower on most measures; very small specialized settings should not be read as direct comprehensive-high-school comparisons.
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