Best High Schools in Zip Code 83639

ZIP code 83639, which covers Marsing, Idaho, contains just one high school serving grades 9–12. Marsing High School is a small public school with 256 students, part of the Marsing Joint District. With 56.25% of students qualifying for free or reduced-price lunch, the school serves a majority low-income population, and its student-teacher ratio is a comfortable 14.2 to 1. Because this is the only high school in the ZIP code, parent comparisons are best made against Idaho state averages and the district's overall numbers.

Marsing High School shows a clear academic strength in English Language Arts. On the most recent End of Course tests, 66.1% of students were proficient in ELA, nearly 5 points above the state average of 61.3%, and the previous year's All Grades results showed a similar advantage. Math and science are weaker areas: end-of-course math proficiency was 30.4% versus 33.1% statewide, while science proficiency was 32.7% versus 41.2% statewide. The 2024–2025 All Grades science figure was especially concerning at just 24.1% proficient, roughly 18 points below the state average. The graduation rate of 82.5% exactly matches both district and state figures, meaning about 1 in 6 students does not graduate on time. The school's state ranking has seesawed dramatically, falling from 14th out of 159 Idaho high schools (5 stars) in 2023–2024 to 70th out of 122 (2 stars) by 2025–2026, though test scores did not collapse to the same degree, suggesting the drop may reflect changes in ranking methodology.

The most impressive statistic may be chronic absenteeism: only 4.3% of Marsing High School students are chronically absent, compared to 9.5% in the district and 13.8% statewide — less than one-third of the state rate. This points to strong student engagement and attendance habits. Achieving above-average ELA results and excellent attendance while serving a majority economically disadvantaged student body is genuinely noteworthy. However, the persistent gaps in science and, to a lesser extent, math show that those subjects need targeted support. Overall, Marsing High School offers a solid foundation in literacy and attendance, average graduation outcomes, and clear room for growth in STEM subjects.