Summary:
ZIP code 08865 has one high school, Phillipsburg High School, serving grades 9–12 and enrolling 1,750 students. In 2024–2025, its graduation rate was 90%, compared with 89% statewide, while chronic absenteeism was 23%, versus 14% statewide. The most important finding is that test performance is uneven: in 2025–2026, Phillipsburg was above the state in 4 of 11 reportable comparisons and below it in 7.
Phillipsburg’s strongest comparisons were in Algebra II: 68% proficient, 16 percentage points above the state for the End of Course exam, and 16 points above in grade 9. It also exceeded the state in Geometry grade 10, with 26% proficient versus 13%, and Algebra I grade 9, with 33% versus 22%. Its largest shortfall was Geometry End of Course: 26% proficient, 26 points below the state. Other notable gaps were Algebra I grade 10, at 0% versus 20%, and grade 9 English Language Arts, at 37% versus 51%. These differences show that a broad label such as “strong in math” would miss important variation by course and grade.
Across nine test-and-grade comparisons available in both years, Phillipsburg’s state gap improved in five and worsened in four; its average gap shifted from about 2 points below the state in 2024–2025 to about 3 points below in 2025–2026. The biggest year-to-year declines were in Algebra II, where proficiency fell 28 points in both End of Course and grade 9 results. SchoolDigger’s percentile ranking also edged down, from 43 in 2023–2024 to 39 in 2025–2026; its latest listing is 2 stars and rank 264 of 434 New Jersey high schools. Other context includes a 12.5 student–teacher ratio and 47% free/reduced lunch eligible in 2024–2025. With only one school in the area listing, there is no local school-to-school comparison.
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