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Top 20 Best Missouri Private Schools Belonging to Independent Schools Association of the Central States (ISACS) (2025)

For the 2025 school year, there are 36 private schools belonging to Independent Schools Association of the Central States (ISACS) serving 12,750 students in Missouri. You can also find more schools membership associations in Missouri.

The private schools belonging to Independent Schools Association of the Central States (ISACS) in Missouri include Chaminade College Prep School, MICDS (Mary Institute and St. Louis Country Day School), and Thomas Jefferson Independent Day School.

The average tuition cost is $24,126, which is higher than the Missouri private school average tuition cost of $13,034.

31% of private schools belonging to Independent Schools Association of the Central States (ISACS) in Missouri are religiously affiliated (most commonly Catholic and Christian).

Villa Duchesne School Photo - Villa Duchesne Upper School (Girls, grades 7-12)

Chaminade College Prep School Photo - 2015 Senior House Captains

Notre Dame de Sion High School Photo - Centered around a shared mission, Notre Dame de Sion School aims to prepare students for socially responsible, values-based leadership in a culturally and religiously diverse world. Both our Grade School and High School Campuses embrace an "Implicit Curriculum" and an "Explicit Curriculum" rooted in the Charism of the Congregation of the Sisters of Notre Dame de Sion.

The St. Michael School Of Clayton Photo - Children communicate through many materials, often referred to as the 100 Languages of Children." The senses play a big role in the learning process children must be able to touch, move, listen, see and hear in order to fully process something.

Thomas Jefferson Independent Day School Photo - Come visit us to experience the TJ way!

The Wilson School Photo - Newly renovated facilities at The Wilson School include an innovation room, featuring a state-of-the-art immersion wall with 18 flat screen panels. The flexible space will soon become a part of a complete Thinking Lab with tools like 3D printers, a feedback wall, and other areas that mimic the creative process and project-based learning at Wilson.

Columbia Independent School Photo - Columbia Independent School is a JK-12th grade college preparatory school with enrollment of almost 400 students. We look forward to having your child become a CIS Lion!

MICDS (Mary Institute and St. Louis Country Day School) Photo - State-of-the-art STEM teaching facilities, McDonnell Hall and Brauer Hall

Rohan Woods School Photo - Whether learning to Roller Skate or tackling a Project in Senior Kindergarten, our students have an adventure every day.

Saul Mirowitz Jewish Community School Photo - Sneak a Peek at Mirowitz

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