Summary:
Zip code 83251 contains exactly one high school, Mackay Junior/Senior High School, a small rural combined junior/senior high school serving grades 7 through 12 in Mackay, ID, with an enrollment of 104 students. As the only school in the zip code, it is the standout by default, notable for its small class sizes, a 13:1 student-teacher ratio, and its membership in the Mackay Joint District, which is rated 3 stars and ranks 42nd out of 101 Idaho districts.
The most recent school ranking (2024–2025) placed Mackay Junior/Senior High School 49th out of 112 schools with a 3-star rating, recovering from a 2-star rating in 2022–2023. The graduation rate of 82.5% exactly matches both the district and state averages. However, chronic absenteeism is a concern, with 22.7% of students chronically absent compared to 15.0% for the district and 13.8% statewide. Test proficiency data from 2025–2026 shows math proficiency at just 19.6% versus a 43.1% state average, while ELA proficiency is 45.8% compared to 54.0% statewide. Science proficiency is close to the state average at 40.0% versus 41.2%.
The most dramatic finding is the year-over-year decline in test scores. ELA proficiency fell from 63.3% in 2024–2025 to 45.8% in 2025–2026, a drop of 17.5 percentage points, while math fell from 28.6% to 19.6%. This decline happened while state averages stayed flat, suggesting it is not a statewide trend, though the very small student population means even a small number of students can swing percentages significantly. Reassuringly, the school has proven it can outperform the state in ELA, achieving 63.3% proficiency in 2024–2025, and the 7th-grade ELA proficiency gap of 16.8 points suggests intervention in middle school could help. For parents, math improvement and attendance should be top priorities, as the school's strengths in ELA and science provide a foundation to build on.
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