Summary:
ZIP code 02025 covers Cohasset, MA, and contains four public schools — two elementary schools (PK–2 and 3–5), one middle school, and one high school — serving roughly 1,397 students across the Cohasset district, which ranks 24th of 351 Massachusetts districts (93rd percentile, 5 stars).
Cohasset Middle School is the academic standout in the area. It ranks 19th of 478 middle schools statewide in 2025–2026 — the 96th percentile, with 5 stars — and has climbed steadily from 36th in 2023–2024 and 25th in 2024–2025. Its 8th graders posted 89.02% proficiency in ELA, 87.34% in math, and 80.49% in civics, well above state averages of roughly 40%–45%. Deer Hill, the grades 3–5 elementary school, is a stable top-decile performer: 87th of 899 schools (90th percentile, 5 stars), with all-grade scores of 63.26% in ELA, 68.51% in math, and 65.79% in science. Those are strong, though slightly below the district averages of 69.01%, 69.69%, and 67.18%. Cohasset High School remains very strong but slipped to 42nd of 353 (88th percentile, 4 stars) after sitting in the 93rd–95th percentile the prior two years, with 10th-grade ELA at 75.31% and science at 56.96%. Its 99.0% graduation rate and 0.0% dropout rate are notable outcomes. Joseph Osgood serves PK–2 and has no state test scores, since MCAS testing begins later; it feeds into Deer Hill.
Two practical points for families: the middle school achieves the top results with the lowest per-student spending ($17,888) and a 10:1 student-teacher ratio, while the high school spends the most ($20,326) with the smallest ratio (8.9:1) — so spending and class size alone don't explain outcomes. Also, elementary enrollment (716 students) is much larger than middle (300) and high school (381), suggesting larger younger cohorts. Free/reduced-price lunch data are unavailable, and spending figures are from 2020–2021, so cross-year comparisons should be read with care.
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