Summary
Concord Carlisle High is a public high school at 500 Walden Street in Concord, MA, serving about 1,191 students in grades 9–12 as part of the Concord-Carlisle district. It ranks 18th of 353 Massachusetts high schools in 2025–2026 — the 95th percentile, 5 stars — and has earned 5 stars every year shown from 2014–2015 through 2025–2026, with statewide ranks between 11th and 27th.
On the 2025–2026 10th grade MCAS, 80.78% of students were proficient in math, 76.87% in science, 73.14% in ELA, and 78.33% on the Biology end-of-course test, compared with state rates of 43.73%, 40.5%, 45.48%, and 37.68%. Math and science are relative strengths. Nearby Lexington High, Acton-Boxborough Regional High, and Wayland High School scored higher in the latest year, while Weston High, Lincoln-Sudbury Regional High, and Bedford High scored lower in math and science. ELA is the softer spot: proficiency fell from 83.83% to 73.14%, a larger drop than the state's, though still about 27.7 points above it.
Outcomes are strong, with a 97.7% graduation rate and 0.3% dropout rate in 2024–2025, and graduation rates between 97.5% and 99.1% over five years. The student-teacher ratio is 11.4, and per-pupil spending was $21,412 in 2020–2021 — more than Lexington or Acton-Boxborough, which rank higher, so spending alone does not explain results. One watch point: students from low-income families ranked in the 49th percentile for school effectiveness in 2025–2026, down from the 88th percentile in 2023–2024, while most other groups remained in the 90s.
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