Summary:
The high-school list for ZIP code 60432 contains one school, Joliet Central High School, serving grades 9–12 in Joliet and enrolling 3,295 students. In the latest year, its averages were 27% across the three grade-11 ACT subjects and 27% across six grade-9 and grade-10 PreACT Secure results, compared with state averages of 46% and 48%, respectively. The most important finding is that all nine latest subject-and-grade results were below both district and state rates.
There is no meaningful local top-to-bottom comparison: Joliet Central is both the highest- and lowest-ranked school in this one-school list. Its strongest latest result was grade-9 ELA, with 41% proficient; its weakest was grade-10 math, at 15%. Across the nine results, it trailed the state by 18 to 24 percentage points and the Joliet Township HSD 204 by 4 to 7 points. SchoolDigger ranked the school 526th of 620 statewide, at the 15th percentile, in 2025–2026.
Year-to-year results offer some encouraging ACT movement but a mostly downward pattern on the earlier-grade PreACT tests. Grade-11 ACT proficiency rose in all three subjects: ELA went from 28.0% to 28.3%, math from 19% to 21%, and science from 27% to 30%. PreACT grade-10 results fell by 6 points in ELA, 2 in math, and 6 in science; in grade 9, ELA and science fell by 2 and 6 points, while math rose by 5. These are school-year snapshots, not measurements of the same students’ progress. Other context includes an 18.2 student–teacher ratio in 2024–2025 and 78% free/reduced lunch eligible in 2024–2025. The available local list has no other school for comparison.
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