Best Illinois Private High Schools Belonging to Independent Schools Association of the Central States (ISACS) (2025-26)
For the 2025-26 school year, there are 9 private high schools belonging to Independent Schools Association of the Central States (ISACS) serving 4,337 students in Illinois. You can also find more schools membership associations in Illinois.
11% of private high schools belonging to Independent Schools Association of the Central States (ISACS) in Illinois are religiously affiliated (most commonly Jewish).
Considering a mid-year transfer from public to private school? Learn what to expect with admissions, academic placement, social adjustment, and financial aid to ensure a smooth transition.
Discover the key differences between day and boarding schools to determine the best fit for your child. Explore benefits, costs, lifestyle factors, and questions to help guide your family’s decision.
