Summary:
Zip code 60189 has one high school, Wheaton Warrenville South High School, serving grades 9–12 and enrolling 1,864 students; with no other high schools in the ZIP code, families have no local high-school peer comparison in this data. The strongest overall finding is that the school’s proficiency rates were above the state’s in all nine 2025–26 subject, grade, and exam comparisons, by 17 to 23 percentage points.
There is no separate top- or bottom-ranked school here because Wheaton Warrenville South is the only school listed. Within its results, its largest advantages over the state were in grade 9 PreACT English Language Arts and Science, both 23 percentage points; its smallest was in grade 11 ACT Science, at 17 points. The school’s average state advantage was 21 points in English Language Arts, 20 in Science, and 19 in Mathematics. It was not ahead of the district in every test: it exceeded Cusd 200 in three of nine comparisons and fell short in six, including grade 10 PreACT Math by 3 points.
Results generally improved relative to the state from 2024–25 to 2025–26: school scores rose in eight of nine matched comparisons, and the average state advantage grew from 18 to 20 percentage points. Two grade 9 gaps narrowed slightly, including Math, where the school’s score rose to 63% but the state’s rose faster. SchoolDigger’s ranking improved from 83rd of 697 schools in 2023–24 to 49th of 620 in 2025–26; its percentile was 92nd in both the last two years. The student–teacher ratio was 14.9:1 in 2024–25, and 29% of students were free/reduced lunch eligible that year. Graduation was 96% in 2025–26, compared with 90% statewide; chronic absenteeism was 15%, below the state’s 24% but above the district’s 13%.
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