Summary:
ZIP code 01890 has exactly one high school, Winchester High School, serving grades 9–12 with 1,404 students in Winchester, Massachusetts, as part of the Winchester district.
Winchester High School is a top-ranked Massachusetts high school: its district ranks 7th of 351 statewide, 98th percentile, 5 stars, and the school ranks 8th of 353 in 2025–2026, also 98th percentile with 5 stars. That is its strongest reported rank, improving from 16th in 2024–2025 and 11th in 2023–2024, with 5 stars in every reported year. MCAS Next Generation proficiency is far above state levels in every reported subject. In 2025–2026, school proficiency exceeds the state by +38.99 points in ELA, +41.36 points in Mathematics, +37.89 points in Science, and +44.11 points in Biology End of Course. In 2024–2025, gaps ranged from +30.76 to +38.85 points. Mathematics showed the strongest comparable 10th-grade improvement, rising from 78.34 to 85.09, a gain of +6.75 points. ELA rose from 81.42 to 84.47 while the state fell from 50.66 to 45.48, widening the school’s advantage from +30.76 to +38.99 points. Science declined from 84.74 to 78.39 but still beat the state by +37.89 points.
Outcomes are strong: the 2024–2025 graduation rate is 97.5% at the school versus 96.0% district-wide, and the dropout rate is 1.6% versus 1.8%. School and district MCAS results are nearly identical, with 2025–2026 differences of only 0.15 to 0.75 points and 2024–2025 differences of 0.90 to 1.53 points. Resource data show a 14.8 student-teacher ratio in 2024–2025 and $15,142 per-student spending in 2020–2021, though no state or district comparison is provided; the spending year is older than the ranking and test-score data. Free/reduced lunch is not provided, so it should be treated as unknown, not 0%. The main caveat is mixed years and grade scopes: 10th-grade MCAS, Biology End of Course, and Biology All Grades rows should not be compared as identical measures. Overall, the record shows a consistently high-performing, top-ranked school that is substantially above state proficiency levels.
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