Summary:
The Merrimack High School is the only high school in the Merrimack School District, serving grades 9–12 in Merrimack, New Hampshire. It enrolls 1,057 students and has a 12.4:1 student-teacher ratio. Because it is the district’s only high school, its results represent the district’s entire high-school program. Families will find a school with strong graduation and student-retention outcomes, though academic performance varies considerably by subject.
The school’s strongest indicators are its 91.8% graduation rate and very low 0.7% dropout rate. Both compare favorably with New Hampshire overall, where the graduation rate is 87.0% and the dropout rate is 2.3%. Reading is another clear strength: 66% of students reached proficiency on the latest NH SAS reading assessment, compared with 55% statewide. The school also matched or exceeded state results in SAT reading, with 66% proficient compared with 62% statewide. These results suggest that most students remain on track to finish high school and that literacy is a particular area of strength.
Mathematics is the most important area for improvement. Only 25% of students were proficient on the latest NH SAS mathematics assessment, compared with 47% in the district and 44% statewide; SAT mathematics proficiency was also below the state result, at 25% versus 30%. Science proficiency was 38%, matching the district and state, but it declined from 47% the previous year. The school’s ranking also slipped from the 75th percentile in 2023–2024 to the 64th percentile in 2025–2026, although it remains above the midpoint of the comparison group. Overall, the school offers strong completion outcomes and reading performance, with mathematics achievement and recent academic declines warranting close attention.
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