Summary:
ZIP code 03801 in Portsmouth, New Hampshire, has one listed high school serving grades 9–12: Portsmouth High School, a 1,017-student school in the highly rated Portsmouth School District.
Portsmouth High School has strong overall outcomes for students and families to consider. Its graduation rate is 95.5%, well above New Hampshire’s 87%, while its dropout rate is just 0.8%, compared with 2.3% statewide. Academic performance is especially strong in reading, where 82% of students are proficient, compared with 55% statewide. Science is another strength, with 61% proficiency versus 38% statewide. The school also reports a relatively favorable student–teacher ratio of 11.4 to 1 and a free or reduced-price lunch rate of 11.01%. These figures provide useful context, although they do not describe class sizes or every student’s individual experience.
Mathematics is the main area where families may want to look more closely. Math proficiency is 51%, which is above the state result of 44% but 16 percentage points below the district’s 67%. The school’s 11th-grade SAT results are also above state averages, with 51% proficiency in math and 82% in reading. Reading improved slightly from the prior year, science remained stable, and math declined by one point. The school has maintained a five-star rating and remained among New Hampshire’s top-ranked high schools, ranking seventh of 89 schools in 2025–2026. Overall, the available data portrays a consistently high-performing school, with particularly strong graduation, reading, and science results and a clear opportunity to strengthen mathematics.
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