Summary:
ZIP code 55920 is served by exactly one public high school: Byron Senior High School in Byron, Minnesota. It enrolls 695 students in grades 9–12 and belongs to the Byron Public School District. With only one high school in the area, there are no local schools to compare it against, so the most useful comparisons are against district and state averages — and on nearly every measure, this school comes out ahead.
Byron Senior High is an elite Minnesota high school by state ranking, earning a 5-star rating in each of the last three years and staying in the top 5% of high schools statewide: 22nd of 473 in 2025–2026, 13th of 450 in 2024–2025, and 20th of 480 in 2023–2024. The district is strong too — 11th of 458 districts statewide, at the 98th percentile with 5 stars. Completion outcomes are excellent: a 94.2% graduation rate versus 84.9% statewide, and a 1.1% dropout rate versus 4.2% statewide. Enrollment is 695, the student-to-teacher ratio is 21.9, and 14.96% of students qualify for free or reduced lunch.
Test results are strong, with science the standout: 61.0% End-of-Course proficiency in 2025–2026 versus 35.0% statewide, and 68.1% in 2024–2025 versus 26.15%. Tenth-grade reading was 59.7% versus 42.5% statewide, and 11th-grade math 44.7% versus 35.3%. Note that the school's "All Grades" figures match its tested high school grades, while district and state "All Grades" numbers blend many grade levels, so grade-specific comparisons are fairest. Math is the area to watch: lowest of the three subjects in both years and down 8.72 points year over year. Reading (down 14.86 points) and science (down 7.1 points) also dipped, though all three remain above state averages.
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