Summary:
ZIP code 62234 has one high school, Collinsville High School, serving grades 9–12 with 1,956 students. In 2025–2026, its proficiency rates were below Illinois’s in all nine reported test, subject, and grade comparisons, by 9 to 14 percentage points.
Because it is the only school in the list, Collinsville High School is both the local reference point and the only school to assess; there is no local top or bottom school to compare. Its highest reported proficiency was 48% in grade 9 PreACT ELA, while its lowest was 26% in grade 11 ACT mathematics. Against the state, its closest result was grade 9 PreACT science, at 38% versus 47% (a 9-point gap); its widest gap was grade 11 ACT mathematics, at 26% versus 40% (14 points). Across all nine comparisons, the school averaged 36% proficient versus 47% statewide, a 12-point gap. These highs and lows describe different tests and grades, not a like-for-like ranking.
Results moved unevenly, but the average gap with the state widened from about 11 points in 2024–2025 to 12 points in 2025–2026. ACT proficiency fell in all three subjects; in contrast, PreACT mathematics rose by about 7 points in both grades, and PreACT science edged up by about 1 point in both. SchoolDigger’s ranking also declined: from 408 of 697 schools (41st percentile, 2 stars) in 2023–2024 to 453 of 620 (27th percentile, 1 star) in 2025–2026. For context, the school’s student-teacher ratio was 14.8:1, and 66% were free/reduced lunch eligible in 2024–2025. In 2025–2026, graduation was 88% versus 90% statewide, dropout was 4% versus 2%, and chronic absenteeism was 30% versus 24%.
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