Summary:
Zip code 06786, covering Terryville, Connecticut, contains just one high school — Terryville High School — which serves grades 9 through 12 and enrolls 337 students as part of the Plymouth School District.
Terryville High School presents a mixed profile for parents. On the positive side, its graduation rate of 93.2% exceeds the Connecticut state average of 91.2% and nearly matches the district rate of 93.3%. However, academic proficiency on state assessments tells a different story. Only 15.7% of 11th graders scored proficient in SAT math in 2025–2026, compared to 31.3% statewide, and just 30.0% reached proficiency in NGSS science versus 50.5% statewide. These figures represent dramatic one-year declines from 28.0% to 15.7% in math and from 46.4% to 30.0% in science, while state averages stayed flat. Chronic absenteeism is also concerning, with 21.3% of students chronically absent — higher than both the district rate of 17.0% and the state rate of 16.4%.
The school serves a majority low-income student body, with 54.3% of students eligible for free or reduced-price lunch. The Plymouth School District ranks 131 out of 153 Connecticut districts, placing it in the bottom 14%. Terryville High School's own state ranking has been volatile: it earned a 3-star rating at the 56th percentile in 2024–2025 but fell to a 1-star rating at the 28th percentile in 2025–2026. The school maintains a relatively low student-to-teacher ratio of 10.6, which should support smaller classes and individualized attention, yet academic outcomes remain well below state averages. The gap between its strong graduation rate and weak college-readiness test performance is the most important issue for families to explore.
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