Portsmouth High School
Portsmouth, NH · High School · Grades 9-13
Portsmouth High School is a high school in Portsmouth, NH with 1,032 students enrolled and a 73% proficiency rate. Part of Portsmouth School District. NCES data from the U.S. Department of Education.
Get Portsmouth High School's new scores when they post
We'll email you the moment Portsmouth High School changes. No spam — only real updates.
About This School
Portsmouth High School is a high school located in Portsmouth, New Hampshire. The school serves 1,032 students in grades 9-13. The student-to-teacher ratio is 11.7:1.
According to EDFacts assessment data, 73% of students meet grade-level proficiency standards in combined math and reading. The school reports a 87% graduation rate.
11% of students qualify for free or reduced-price lunch.
Portsmouth High School is part of the Portsmouth School District in New Hampshire.
How This School Compares
Portsmouth High School has 1,032 students enrolled, making it larger than the average school in Portsmouth School District (414 students). Its 73% proficiency rate is 14 percentage points above the district average of 60%. Compared to the New Hampshire state average of 60%, the school performs 14 points higher. With a 11.7:1 student-teacher ratio, it offers smaller class sizes than the national average.
Frequently Asked Questions
Portsmouth High School has 1,032 students enrolled in grades 9-13. The student-to-teacher ratio is 11.7:1.
According to EDFacts data, 73% of students at Portsmouth High School meet grade-level proficiency standards in combined math and reading assessments.
Portsmouth High School has a 87% graduation rate, measuring the percentage of students who graduate within four years.
Portsmouth High School is part of the Portsmouth School District in Portsmouth, New Hampshire. You can view all schools in this district on the district page.
All data on this page comes from the National Center for Education Statistics (NCES) Common Core of Data and EDFacts assessment results. These are official federal datasets published by the U.S. Department of Education.
School profiles are built from NCES directory data and EDFacts assessment results. Proficiency rates reflect combined math and reading performance. Graduation rates are reported for high schools with available data.
The this entity record above pulls directly from NCES Common Core of Data and EDFacts. What follows is the per-entity context — how this entity sits in the broader U.S. K-12 school outcomes and enrollment distribution and which underlying factors drive the headline numbers.
Every number on this page links back to NCES Common Core of Data and EDFacts; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. public schools and districts. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: NCES Common Core of Data, 2026.