Principia School

Principia School

Private Pre-K, Elementary, Middle, High School | Grade Pre-K-12
13201 CLAYTON Rd,  Saint Louis, MO
4.4
4.6
433 Students
A+
Niche Grade

School Details

Student Teacher Ratio
6:1
Average SAT Score
1180
Average ACT Score
27
Average GPA
3.65
Graduation Rate
100%
Annual Tuition
$25,010
Religious Affiliation
Christian
Boarding Program
Offers Boarding

Niche Grade

A
Academics
A-
Teachers
A
College Prep
A+
Resources/Facilities
A+
Clubs and Activities
A
Sports
Source: Niche
Niche Grades

Niche grades and rankings are calculated using dozens of public data sets and millions of reviews. Niche data scientists and user researchers rigorously analyze data and user opinions to assess the key aspects of K-12 Schools, Colleges, and Places to Live. Every month, millions of students and families use the Niche grades and report cards to find the right school or neighborhood.

Niche Grade Details

Academics
Average GPA
3.65
Teachers
Student Teacher Ratio
6:1
Teachers
81
Full Time Teachers
77
Part Time Teachers
4
Teachers in First or Second Year
17.3%
College Prep
Average SAT
1180
Math
580
Verbal
600
Average ACT
27
Math
24
English
29
Reading
30
Science
26
Number of AP Courses
21
Four-Year Matriculation Rate
96%
Clubs and Activities
Girls Athletic Participation
Very High
Boys Athletic Participation
Very High

GreatSchools Rating Details

Student Diversity

Female
93.3%
Male
6.7%
White
100%

School Rankings

#1 Best Christian Schools in Missouri
#2 Best Boarding HS in Missouri
#6 Best Private K12 Schools in Missouri
Source: Niche

Specialty School Programs

Athletics Program

Colleges Students are Considering

Students are most interested in or go on to attend these colleges.
Principia College 95 Students
Washington University in St. Louis 41 Students
Saint Louis University 29 Students
Maryville University of St. Louis 29 Students
New York University 22 Students
University of California - Los Angeles 21 Students
University of Missouri 21 Students
Boston University 20 Students
University of Missouri—St. Louis 20 Students
Illinois Wesleyan University 20 Students

What Students Want to Study

Niche users from this school are most interested in the following majors.
Business 51 Students
Marketing 24 Students
Computer Science 20 Students
Economics 18 Students
International Business 17 Students
Political Science and Government 15 Students
Sociology 15 Students
Biology 14 Students
Communications 13 Students
Finance 12 Students

This School’s Reviews

Niche Reviews
4.4 85 Reviews
5.0 Senior
6/11/2025
Principia School has opened its doors to me. Providing generous financial aid to everyone, including international students. The community is diverse as they have students from different states and countries. They make everyone feel accepted and special in the community. I have loved studying in this school, and I am excited to come back to study.
5.0 Parent
10/19/2024
Very grateful for this school and there future ready approach to the students. Opportunities provided at this school have been wonderful for my student and family.
5.0 Parent
7/1/2024
The teachers care so deeply about my children. My children are seen as capable and unlimited in all of their endeavors. It's refreshing to see a school that values love at their core.
GreatSchools Reviews
4.6 22 Reviews
5.0 parent
5/21/2023
this is the best school ive ever been to. Bring your kids here, i know its expensive, but i swear its worth it.
5.0 parent
11/20/2020
Relocating to STL for our kids to attend Principia was the best gift we could give our children. Our youngest (Preschool) exudes an endless stream of joy and happiness. She overflows with love for her teachers, her new friends, and her experience. The transformation we’ve seen in our eldest (gr. 4)...
5.0 parent
7/19/2020
Excellent. There has been drastic improvement in my child’s grades and overall character to be a well rounded individual. The boarding system is excellent and adds to the expectations of responsibility by the kids.
5.0 parent
6/18/2020
Excellent. My children had opportunities to play sports, receive great instruction in class and in sports, meet students from all over the world, travel to Israel for Bible class, and grow as individuals.

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Principia School is a private Christian school for students in grades Pre-K-12 located at 13201 CLAYTON Rd in Saint Louis, in the Town and Country neighborhood. Annual tuition is $25,010. The school has a total enrollment of 433 and maintains a student-teacher ratio of 6:1. Principia School has received feedback and ratings, with a Niche grade of A+. The average GPA is 3.65, the graduation rate is 100%, and average standardized test scores include an SAT score of 1180 and an ACT score of 27. The average home value in this area is $216,847. Discover additional schools in the area, like Visitation Academy Of St Louis, Villa Duchesne and Oak Hill School, Chaminade College Prep School, and more. Learn more about what Saint Louis has to offer, and browse homes for sale and for rent near Principia School.

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