Summary:
ZIP code 03582 contains one high school, Groveton High School, serving grades 9–12 in the Northumberland area. The school enrolls 121 students and is part of the Northumberland School District. With a student-teacher ratio of 8.6:1, Groveton is a small school where students may have access to relatively individualized support. About 26% of students participate in free or reduced-price lunch programs, providing useful context when considering school results.
Recent results show encouraging improvement. Groveton’s ranking rose from the 7th percentile in both 2023–2024 and 2024–2025 to the 46th percentile in 2025–2026, when it received a two-star rating. Academic gains were broad: NH SAS proficiency increased 16 percentage points in math, 17 points in reading, and 10 points in science. Reading is the school’s strongest tested subject, with 56% of students proficient in 2025–2026—higher than both the district’s 49% and the state’s 55%. Graduation outcomes are also positive: Groveton’s 90.9% graduation rate exceeded New Hampshire’s 87.0% rate, and its reported dropout rate was 0.0% compared with 2.3% statewide.
Despite the progress, math and science remain important areas to watch. Math proficiency reached 33%, but this was below the district’s 40% and the state’s 44%. Science proficiency was 25%, slightly above the district’s 24% but well below the state’s 38%, representing the largest statewide gap. SAT results were generally similar to district performance: Groveton matched the district in math and reading, exceeded the state in math, and trailed the state in reading. Overall, the school’s recent direction is positive, but its small enrollment can make percentages vary from year to year. Continued improvement over several years—especially in math and science—will help show whether the latest gains are lasting.
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