For the 2025-26 school year, there are 888 religiously affiliated private schools serving 189,955 students in Illinois (55% of all schools).
The average tuition cost is $9,340, which is lower than the Illinois private school average tuition cost of $12,697.
The most common religiously affiliated schools are Catholic (48% of schools), Christian (16% of schools) and Lutheran Church Missouri Synod (13% of schools).
Top Ranked Illinois Private Schools by Religious Affiliation (2025-26)
Religious Affiliation
# Schools
# Students
% Minority
Recent Articles
Transferring from Public to Private School Mid-Year: What to Expect
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.
A Guide to Day vs. Boarding School: Which Is Right for Your Family
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.
The A to Z of Private Schools 2025
Explore the A to Z of private schools in 2025—from admissions to tuition—offering parents and educators clear insights into today’s options.
