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

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

For the 2025 school year, there are 20 private high schools belonging to Independent Schools Association of the Central States (ISACS) serving 9,508 students in Missouri. You can also find more schools membership associations in Missouri.
The top ranked private high schools belonging to Independent Schools Association of the Central States (ISACS) in Missouri include MICDS (Mary Institute and St. Louis Country Day School), Thomas Jefferson Independent Day School, and Chaminade College Prep School.
The average tuition cost is $26,250, which is higher than the Missouri private high school average tuition cost of $14,934.
30% of private high schools belonging to Independent Schools Association of the Central States (ISACS) in Missouri are religiously affiliated (most commonly Catholic and Christian).

Top Ranked Private High Schools Belonging to Independent Schools Association of the Central States (ISACS) in Missouri (2025)

School
Location
Grades
Students
Chaminade College Prep School
Chaminade College Prep School Photo - 2015 Senior House Captains
All-boys (Catholic)
425 S. Lindbergh Blvd
Saint Louis, MO 63131
(314) 993-4400
Grades: 6-12
| 851 students
Columbia Independent School
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!
(3)
1801 N Stadium Blvd
Columbia, MO 65202
(573) 777-9250
Grades: PK-12
| 400 students
101 N Warson Rd
Saint Louis, MO 63124
(314) 995-7448
Grades: PK-12
| 1,241 students
101 North Warson Road
Saint Louis, MO 63124
(314) 995-7367
Grades: PK-12
| 1,253 students
Miriam School and Learning Center
Special Education School
1138 N. Warson Road
Saint Louis, MO 63132
(314) 962-6059
Grades: K-12
| 161 students
Missouri Military Academy
Missouri Military Academy Photo - Missouri Military Academy develops cadets who are of sound moral character, who have self-disciplined to strive for and achieve their goals and who are academically prepared to attend college.
All-boys
(1)
204 N Grand St
Mexico, MO 65265
(573) 581-1776
Grades: 7-12
| 193 students
Notre Dame de Sion High School
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.
(Catholic)
(3)
10631 Wornall Road
Kansas City, MO 64114
(816) 942-3282
Grades: 9-12
| 311 students
Oakhill Day School
Oakhill Day School Photo
7019 North Cherry Street
Kansas City, MO 64118
(816) 436-6228
Grades: PK-12
| 429 students
Pembroke Hill School
Pembroke Hill School Photo
400 W 51st St
Kansas City, MO 64112
(816) 936-1200
Grades: NS-12
| 1,181 students
3401 Newman Rd
Joplin, MO 64801
(417) 781-5124
Grades: PK-12
| 316 students
Thomas Jefferson School
Thomas Jefferson School Photo
Special Program Emphasis
(1)
4100 S Lindbergh Boulevard
Saint Louis, MO 63127
(314) 843-4151
Grades: 7-12
| 75 students
Villa Duchesne School
Villa Duchesne School Photo - Villa Duchesne Upper School (Girls, grades 7-12)
All-girls (Catholic)
10801 Conway Road
Saint Louis, MO 63131
(314) 432-2021
Grades: PK-12
| 564 students
Visitation Academy Of St. Louis
Visitation Academy Of St. Louis Photo
All-girls (Catholic)
3020 North Ballas Road
Saint Louis, MO 63131
(314) 625-9100
Grades: PK-12
| 619 students
Westminster Christian Academy
Westminster Christian Academy Photo
(Christian)
800 Maryville Centre Dr
Chesterfield, MO 63017
(314) 997-2900
Grades: 7-12
| 946 students
The Whitfield School
The Whitfield School Photo
175 S Mason Rd
Saint Louis, MO 63141
(314) 434-5141
Grades: 6-12
| 404 students
DaySpring Arts & Education
DaySpring Arts & Education Photo
(Christian)
(4)
2500 Metro Blvd.
Maryland Heights, MO 63043
(314) 291-8878
Grades: PK-12
| 87 students
The Fulton School
The Fulton School Photo - Our Montessori classrooms give students a one-of-a-kind, hands-on experience.
Montessori School
(12)
1100 White Road
Chesterfield, MO 63017
(314) 469-6622
Grades: NS-12
| 127 students
Great Circle Edgewood Children's Center
Special Education School
330 N. Gore
Saint Louis, MO 63119
(314) 399-4393
Grades: 1-12
| 66 students
Logos School
Special Education School
9137 Old Bonhomme Rd
Saint Louis, MO 63132
(314) 997-7002
Grades: 6-12
| 113 students
The Summit Preparatory School
The Summit Preparatory School Photo
Alternative School
(2)
202 E. Walnut Lawn St.
Springfield, MO 65807
(417) 869-8077
Grades: PK-12
| 171 students

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