Summary:
Zip code 83420 contains just one high school, North Fremont Junior/Senior High School, a combined grades 6–12 school serving 316 students in Ashton, ID. This small school is part of the Fremont County Joint District and serves a student population where nearly 45% qualify for free or reduced lunch, yet it maintains a student-teacher ratio of 14.3:1 and lower chronic absenteeism (11.1%) than both the district (12.2%) and state (13.8%).
North Fremont has shown dramatic improvement in recent years. Its state ranking rose from the 5th percentile (rank 101 out of 106) in 2022–2023, to the 16th percentile in 2023–2024, and up to the 30th percentile (rank 86 out of 122) in 2025–2026. In the most recent school year, the school outperformed its district in all three all-grades test subjects, with math at 42.3% (district 37.1%), science at 36.5% (district 33.8%), and English Language Arts at 52.7% (district 45.6%). Year-over-year gains were striking: math rose by 9.9 points, science by 11.0 points, and ELA by 15.9 points.
Grade-level results are mixed. The school is strongest in 6th and 7th grade math, exceeding both district and state averages, and 7th grade ELA proficiency is a clear strength at 61.4%. However, 8th grade math (34.0%) and ELA (44.9%) fall below state averages, and end-of-course science is the biggest concern at 22.9% proficiency—18.3 points below the state's 41.2%. Overall, North Fremont Junior/Senior High School is a district leader with a positive trajectory, despite still trailing the state in science and some upper-grade subjects.
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