Saint Louis Priory School is a faith-centered, Catholic, independent day school for boys in grades seven through twelve offering a nationally recognized accelerated curriculum designed to qualify its graduates for admission to distinguished colleges and universities and to prepare them to undertake their continuing studies with success.
The school represents the primary work of the Benedictine monks of Saint Louis Abbey, founded in 1955 by monks of Ampleforth Abbey in York, England.
In addition to one of the strongest college preparatory programs in the area, the school seeks to ground young men in the knowledge and practice of the Roman Catholic faith, supported by the highest percentage of religious teaching faculty of any Catholic high school in Saint Louis.
In addition to providing a comprehensive program of studies in the humanities, sciences and theology, the curriculum requires participation in athletics, fine arts, community service and a senior thesis.
Most students undertake college-level work in their last two years, and many receive college placement and credit through the College Board Advanced Placement (AP) Program offered in over a dozen subject areas.
The school is located on a 150-acre campus in West Saint Louis County.
Nearly 25% of the student body receives financial aid. Reverend Michael Brunner, O.S.B. is Headmaster. Tom Mulvihill 80 is Director of Admission.
Quick Stats (2025)
- Top Ranked MO School
- Grades: 7-12
- Enrollment: 331 students
- Yearly Tuition: $16,536
- Average class size: 18 students
- Application Deadline: None / Rolling
- Source: Verified school update
Top Rankings
St. Louis Priory School ranks among the top 20% of private schools in Missouri for:
Category
Attribute
Advanced Degrees
Student Body
School Overview
Religious Affiliation
Grades Offered
Grades 7-12
Year Founded
1955
Student Body
Total Students
331 students
Student Body Type
% Students of Color
11%
State avg.: 21%
Students by Grade

Academics and Faculty
Total Classroom Teachers
47 teachers
Student : Teacher Ratio
7:1
National avg.: 13:1
% Faculty w/Advanced Degree
80%
Average Class Size
18 students
Number of AP Courses
13 courses
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Yearly Tuition Cost
$16,536
Tuition Notes
Lunch fee and book charges are not included in tuition cost.
% on Financial Aid
25%
Average Financial Aid Grant
$7,800
Admissions Director
Tom Mulvihill
Admissions Associate
Brother Cassian Koenemann, OSB
School Notes
- Saint Louis Priory School is a faith-centered, Catholic, independent day school for boys in grades seven through twelve offering a nationally recognized accelerated curriculum designed to qualify its graduates for admission to distinguished colleges and universities and to prepare them to undertake their continuing studies with success. The school represents the primary work of the Benedictine monks of Saint Louis Abbey, founded in 1955 by monks of Ampleforth Abbey in York, England. In addition to one of the strongest college preparatory programs in the area, the school seeks to ground young men in the knowledge and practice of the Roman Catholic faith, supported by the highest percentage of religious teaching faculty of any Catholic high school in Saint Louis. In addition to providing a comprehensive program of studies in the humanities, sciences and theology, the curriculum requires participation in athletics, fine arts, community service and a senior thesis. Most students undertake college-level work in their last two years, and many receive college placement and credit through the College Board Advanced Placement (AP) Program offered in over a dozen subject areas. The school is located on a 150-acre campus in West Saint Louis County. Nearly 25% of the student body receives financial aid. Reverend Michael Brunner, O.S.B. is Headmaster. Tom Mulvihill 80 is Director of Admission.
Source: Verified school update
Frequently Asked Questions
How much does St. Louis Priory School cost?
St. Louis Priory School's tuition is approximately $16,536 for private students.
What is St. Louis Priory School's ranking?
St. Louis Priory School ranks among the top 20% of private schools in Missouri for: Highest percentage of faculty with advanced degrees and Largest student body.
When is the application deadline for St. Louis Priory School?
The application deadline for St. Louis Priory School is rolling (applications are reviewed as they are received year-round).
School Reviews
Endorse St. Louis Priory School. Endorsements should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
- Academic or athletic awards
Recent Articles

Social Emotional Learning: Education's Hidden Symphony
A musician's perspective on Social Emotional Learning reveals how this educational framework orchestrates success through five essential emotional competencies.

A Roadmap For Starting A Private School
Use this roadmap as a set of talking points with your trusted mentors and professionals to start the private school of your dreams. You're not alone. Over the years, hundreds of folks like you have had the same dream. From Quintilian to Maria Montessori to Lucy Madeira Wing, visionary educators have established schools to teach according to their beliefs and methodologies.

December 31, 2024
The Spectrum of Islamic Education: From Secular to OrthodoxThis article explores the importance of Islamic K-12 education in today's secular society, providing a roadmap for parents to nurture their children's faith and academic success. Through a question-and-answer format between a parent and an imam, it addresses key aspects such as the types of Islamic education available, when to start, and how to balance religious and secular learning. The essay emphasizes the spiritual and moral benefits of instilling Islamic values in young people, offering practical advice and inspiration for families seeking to raise well-rounded and faithful individuals.