For the 2026 school year, there are 3 college-prep and junior boarding schools serving 745 students located throughout Illinois.
You can also browse our full boarding school directory or specify additional search criteria.
Best Illinois Boarding Schools (2026)
Top Illinois Boarding Schools (2026)
Carbondale IL, IL
Gr: 6-12, PG
Student-teacher ratio: 6:1
Avg. class size: 6 students
Acceptance rate: 100%
Tuition listed
900 South Brehm Lane
Carbondale IL, IL 62901
(618) 457-0371
Gr: 9-12, PG | 452 students
Student-teacher ratio: 6:1
Avg. class size: 12 students
Acceptance rate: 34%
Tuition listed
1500 West Kennedy Road
Lake Forest, IL 60045
(847) 615-3267
Gr: 9-12 | 293 students
Student-teacher ratio: 12:1
Avg. class size: 18 students
Acceptance rate: 80%
Tuition listed
Catholic
24 W US Highway 6
Peru, IL 61354
(815) 250-0285
Frequently Asked Questions
How many boarding schools are located in Illinois?
There are 3 college-preparatory boarding schools located in Illinois.
What is the average tuition cost of boarding school in Illinois?
The average Illinois boarding school tuition cost is $61,582 per year.
What is the oldest boarding school in Illinois?
Lake Forest Academy, founded in 1857, is the oldest boarding school in Illinois.
What boarding school in Illinois has the lowest acceptance rates?
Lake Forest Academy has the lowest boarding school acceptance rate (34%) in Illinois.
What boarding school in Illinois has the highest average SAT scores?
Lake Forest Academy has the highest average SAT scores (1430) in Illinois.
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Quick Facts (2026)
- # Boarding Schools: 3
- # Students Served: 745
- Average Tuition: $61,582
- Average Acceptance Rate: 71%
- Average Class Size: 12 students
- % Students Boarding: 44%
- % International Students: 13%
- % Students of Color: 26%
- % Students on Financial Aid: 24%
- % Faculty w/Advanced Degree: 73%
Featured Schools
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- Schools with openings for Fall 2026