Schools in Zip Code 83655

Zip code 83655 in New Plymouth, Idaho is served by three public schools — New Plymouth Elementary (PK–5), New Plymouth Middle School (6–8), and New Plymouth High School (9–12) — all part of the New Plymouth District, which ranks 40th out of 101 Idaho districts with a 3-star rating. Combined, these schools serve 898 students, but they vary widely in performance, with one clear academic leader and one school trending in the wrong direction.

The standout is New Plymouth Middle School, ranked 39th of 174 Idaho middle schools (78th percentile) with a 4-star rating. Its math proficiency (56.8%) and ELA proficiency (63.1%) comfortably exceed state averages, and 8th grade math is exceptional — 70.5% proficient versus 41.2% statewide. It achieves these results despite the district's highest chronic absenteeism rate (16.5%) and the lowest per-student spending ($5,435). Meanwhile, New Plymouth High School is steady but unspectacular: its 82.5% graduation rate exactly matches the state average, and end-of-course scores hover near the state mean in math, science, and ELA.

New Plymouth Elementary is the biggest concern. Its ranking has fallen from the 62nd percentile in 2023–2024 to the 31st percentile in 2025–2026, earning a 2-star rating. The decline is sharpest in 5th grade, where math proficiency sits at just 25.8% versus 42.2% statewide, and ELA at 40.9% versus 55.2%. The elementary also serves the highest share of economically disadvantaged students (42.3% free/reduced lunch), which may contribute to the gap, but the middle school's success with a similar population shows that poverty alone does not determine outcomes. For families, the middle school is clearly the strongest choice in the area; for administrators, 5th grade at the elementary is the most urgent intervention target.