Summary:
High schools in ZIP code 62206 are represented here by one school, Cahokia High School, which serves grades 9–12 and enrolls 850 students. The results point to significant challenges compared with state measures: in 2025–2026, graduation was 66% versus 90% statewide, and chronic absenteeism was 62% versus 24%. The most important finding is that Cahokia’s available academic, graduation, and attendance results are all substantially weaker than state benchmarks.
Because Cahokia is the only school in the list, it is both the highest and lowest by default; the data cannot identify a local school leader or compare schools. Against the state, its 2025–2026 ELA proficiency gaps range from 35.8 to 41.0 percentage points, while science gaps range from 31.5 to 36.9 points. Cahokia’s reported proficiency was 9% on grade 11 ACT ELA, 17% on grade 10 PreACT ELA, and 26% on grade 9 PreACT ELA; no math result is reported for that year. SchoolDigger ranks Cahokia 612th of 620 Illinois high schools, in the 1st percentile, with zero stars.
Recent test-score changes are mixed, and the overall improvement relative to the state is slight: across the six comparable ELA and science measures, the average gap narrowed by about 1 point from 2024–2025 to 2025–2026, even as Cahokia’s average proficiency fell by about 1 point. Grade 9 ELA and grade 11 science proficiency increased, while grade 10 and grade 11 ELA and grade 9 and grade 10 science declined. For context, Cahokia’s student–teacher ratio was 18.5 in 2024–2025, and 76% of students were free/reduced lunch eligible that school year; these figures describe the school but do not explain its results.
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