St. Mary's Preparatory is a Catholic, all-boys, college preparatory high school with a Polish-American heritage and legacy.
Our mission is to provide deserving young men the moral guidance, discipline, and education necessary to become Christian gentlemen, scholars, and men of service and leadership for the world.
By completion of our spiritual and educational model, these men can gain the fortitude, reverence, character, and preparation to meet all challenges for the greater glory of God and their alma mater.
Saint Mary's Preparatory is a four year secondary program of pre-college studies in a disciplined environment preparing young men for future study and careers of service.
The Prep has a day student and boarding school program.
Quick Stats (2025)
- Top Ranked MI School
- Grades: 9-12
- Enrollment: 500 students
- Yearly Tuition: $16,700
- Application Deadline: None / Rolling
- Source: National Center for Education Statistics (NCES)
Top Rankings
St. Mary's Preparatory School ranks among the top 20% of private schools in Michigan for:
School Overview
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades 9-12
Year Founded
1885
Colors
White, Black, Red
School Calendar
Campus Size
115
Student Body
Total Students
500 students
Student Body Type
% Students of Color
20%
State avg.: 18%
Students by Grade

Academics and Faculty
Total Classroom Teachers
34 teachers
Student : Teacher Ratio
15:1
National avg.: 13:1
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Yearly Tuition Cost
$16,700
School Notes
- School Motto: 'God, Family, St. Mary's'
- St. Mary's Preparatory is a Catholic, all-boys, college preparatory high school with a Polish-American heritage and legacy. Our mission is to provide deserving young men the moral guidance, discipline, and education necessary to become Christian gentlemen, scholars, and men of service and leadership for the world. By completion of our spiritual and educational model, these men can gain the fortitude, reverence, character, and preparation to meet all challenges for the greater glory of God and their alma mater. Saint Mary's Preparatory is a four year secondary program of pre-college studies in a disciplined environment preparing young men for future study and careers of service. The Prep has a day student and boarding school program.
- Sample of notable school alumni/alumnae:
- -
Source: National Center for Education Statistics (NCES)
Frequently Asked Questions
How much does St. Mary's Preparatory School cost?
St. Mary's Preparatory School's tuition is approximately $16,700 for private students.
Who are famous alumni from St. Mary's Preparatory School?
St. Mary's Preparatory School famous alumni include: .
What is St. Mary's Preparatory School's ranking?
St. Mary's Preparatory School ranks among the top 20% of private schools in Michigan for: Largest student body and Oldest founding date.
When is the application deadline for St. Mary's Preparatory School?
The application deadline for St. Mary's Preparatory School is rolling (applications are reviewed as they are received year-round).
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