St. Matthias School Photo - St. Matthias is a nurturing and spiritual learning community dedicated to teaching children to be critical thinkers and have a global perspective.

Best Illinois Private Schools Belonging to International Baccalaureate (IB) World School (2025-26)

For the 2025-26 school year, there are 8 private schools belonging to International Baccalaureate (IB) World School serving 2,538 students in Illinois. You can also find more schools membership associations in Illinois.
The top-ranked private schools belonging to International Baccalaureate (IB) World School in Illinois include British International School of Chicago-South Loop, St. Matthias School, and Daystar Academy.
The average acceptance rate is 92%, which is higher than the Illinois private school average acceptance rate of 84%.
38% of private schools belonging to International Baccalaureate (IB) World School in Illinois are religiously affiliated (most commonly Catholic and Christian).

Top-Ranked Private Schools Belonging to International Baccalaureate (IB) World School in Illinois (2025-26)

School
Location
Quick Facts
German International School Chicago
German International School Chicago Photo - Hooray for 8th Grade Graduates
Special Program Emphasis
(1)
1726 W Berteau Ave
Chicago, IL 60613
(773) 857-3000
Gr: PK-8 | 199 students Avg. class size: 15 students Sports: 8 | Extracurrculars: 18 Tuition listed
Beacon Academy
Beacon Academy Photo
Montessori School
1574 Sherman Avenue
Evanston, IL 60201
(224) 999-1177
Gr: 9-12 | 150 students Avg. class size: 12 students Sports: 12 | Extracurrculars: 20 Tuition listed
161 West 9th Street
Chicago, IL 60605
(773) 998-2472
Gr: NS-12 | 799 students Avg. class size: 15 students Sports: 12 Tuition & acceptance rate listed
Daystar Academy
Daystar Academy Photo
Special Program Emphasis (Christian)
(1)
1550 S State St
Chicago, IL 60605
(312) 791-0001
Gr: PK-12 | 301 students Avg. class size: 20 students Sports: 5 | Extracurrculars: 8 Tuition & acceptance rate listed
GEMS World Academy Chicago
GEMS World Academy Chicago Photo
(7)
350 E. South Water Street
Chicago, IL 60601
(312) 809-8900
Gr: PK-8 | 343 students Avg. class size: 18 students Sports: 4
Holy Family Catholic Academy
Holy Family Catholic Academy Photo
(Catholic)
(5)
2515 Palatine Rd
Palatine, IL 60067
(847) 907-3452
Gr: NS-8 | 501 students Avg. class size: 20 students Sports: 6 | Extracurrculars: 6 Tuition listed
St. Matthias School
St. Matthias School Photo - St. Matthias is the only International Baccalaureate (IB) Catholic elementary school in the state of Illinois.
(Catholic)
(7)
4910 N Claremont Ave
Chicago, IL 60625
(773) 784-0999
Gr: PK-8 | 245 students Avg. class size: 20 students Sports: 4 | Extracurrculars: 9 Tuition listed
Peoria Academy
Peoria Academy Photo - Peoria Academy preparing students to be caring, resilient, and successful in an increasingly global tomorrow.
(1)
2711 W Willow Knolls Dr
Peoria, IL 61614
(309) 692-7570
Gr: PK-8 Avg. class size: 13 students Sports: 8 | Extracurrculars: 2 Tuition listed

Recent Articles

How to Start a Private School in 2025: Complete K–12 Guide
How to Start a Private School in 2025: Complete K–12 Guide
A practical, updated guide to starting a private K–12 school in 2025, covering legal steps, planning, finance, and enrollment strategy.
Why Private School? Key Considerations for Families in 2025
Why Private School? Key Considerations for Families in 2025
Learn why families choose private school in 2025, including academics, class size, safety, tuition trends, and admissions guidance.
Scholarships & Financial Aid for 2026 Entry
Scholarships & Financial Aid for 2026 Entry
A comprehensive guide to scholarships, bursaries, and financial aid options for 2026 entry at U.S. private schools.