Best Elementary Schools in Zip Code 83420

There is just one elementary school serving zip code 83420 in Ashton, Idaho: Ashton Elementary School, which enrolls 228 students in grades PK–5 within the Fremont County Joint District. Because only one elementary school exists in this zip code, a within-zip comparison is not possible; instead, all meaningful comparisons are made against the district and Idaho state averages. Ashton Elementary serves a moderate-sized student body, with 55.26% of students eligible for free or reduced-price lunch, indicating a majority low-income population. The school's chronic absenteeism rate of 17.4% is higher than both the district's 12.2% and the state's 13.8%.

The most recent ISAT results (2025–2026) show all-grade math proficiency at 41.6%, trailing the state average of 43.1% but ahead of the district's 37.1%. English language arts proficiency is 43.1%, below both the district (45.6%) and state (54.0%). Fifth-grade science proficiency is 38.8%, slightly below the district (39.1%) and well below the state (44.0%). A notable bright spot is 4th grade math, where 51.3% of students are proficient, exceeding both the district (47.5%) and state (48.0%). However, 3rd grade lags significantly, with 37.8% math and 36.1% ELA proficiency compared to state averages of 50.9% and 48.5% respectively.

Over the past three school years, Ashton Elementary School has seen a steady decline in statewide ranking, falling from the 76th percentile (4 stars) in 2023–2024 to the 45th percentile (2 stars) in 2024–2025, and down to the 27th percentile (1 star) in 2025–2026. All-grade math proficiency dropped sharply from 54.2% to 41.6%, a decline of 12.6 percentage points. The school spends approximately $7,826 per student (2018–2019 data). Overall, Ashton Elementary School performs near its district average but below state averages in most subjects. The combination of elevated chronic absenteeism, high economic disadvantage, and recent declines in both math proficiency and statewide ranking suggests the school could benefit from targeted support in early-elementary foundational skills and attendance improvement.