Schools in Zip Code 83427

Zip code 83427 is home to Iona, Idaho, and contains just one school: Iona Elementary School, a public PK–6 elementary school within the Bonneville Joint District.

Iona Elementary is a clear standout. In the 2025–2026 school year, it ranked 98th out of 346 Idaho elementary schools (72nd percentile) and earned 4 stars, a dramatic improvement from 2 stars (48th percentile) in 2023–2024. The school outperforms its district in every subject: math proficiency is 52.3% versus the district's 41.4%, ELA is 65.3% versus 54.9%, and 5th-grade science is 54% versus 42.9%. Statewide, Idaho averages are 43.1% math and 54% ELA, so Iona is comfortably above both. Grade-level results show particular strength in 5th grade, where math hits 65% (22.8 points above the state) and ELA hits 76% (20.8 points above the state). ELA is strong across all grades, from 56.4% in 3rd grade to 67.7% in 6th.

Despite one-third of students qualifying for free/reduced lunch, the school posts impressive scores. Chronic absenteeism is also better than the district and state at 11.8%. One caution is 6th-grade math, which dips to 44.8%—below the district's 50.5% and only slightly above the state's 42.5%—possibly suggesting a transition challenge before middle school. The student-teacher ratio is high at 23.6, and with no middle or high school in the zip code, students leave Iona after 6th grade to attend schools elsewhere in the Bonneville Joint District. Overall, Iona Elementary is an academic bright spot with strong literacy, improving math, and excellent attendance trends.