St. Mary's is a Catholic, college-preparatory school developing students in grades 6-12 from more than 30 communities on Boston's North Shore. Shaping authentic men and women of talent and faith.
Quick Stats (2025)
- Top Ranked MA School
- Grades: 6-12
- Enrollment: 517 students
- Yearly Tuition: $21,100
- Acceptance rate: 98%
- Average class size: 22 students
- Application Deadline: None / Rolling
- Source: Verified school update
Top Rankings
St. Marys High School ranks among the top 20% of private schools in Massachusetts for:
Category
Attribute
Student Body
Sports offered
School History
School Overview
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades 6-12
Year Founded
1881
School Calendar
School Mascot
Spartan
Student Body
Total Students
517 students
Student Body Type
Co-ed
% Students of Color
46%
State avg.: 29%
Students by Grade

Academics and Faculty
Total Classroom Teachers
46 teachers
Student : Teacher Ratio
11:1
National avg.: 13:1
Average Class Size
22 students
Number of AP Courses
8 courses
Advanced Courses
AP Biology, AP Computer Science, AP English Composition, AP English Literature, AP Psychology, AP Spanish, AP U.S. Government & Politics, AP U.S. History
Classroom Dress Code
Formal
Khaki pants and navy St. Mary
School Colors
Navy Blue, Gold
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Yearly Tuition Cost
$21,100
Acceptance Rate
98%
National avg.: 81%
Application URL
Sports
Total Sports Offered
16 sports
Extracurriculars
Total ExtracurricularsTotal Extra-curric.
12 extracurriculars
ExtracurricularsExtra-curric.
Club or Organization:
Ambassadors, College Bowl, FIRST Robotics, Mock Trial, National Honor Society, National Junior Honor Society, Rachel's Challenge, Science League, Student Council
Arts and Music Programs:
Chorus, Dance Team, Theater Company
Ambassadors, College Bowl, FIRST Robotics, Mock Trial, National Honor Society, National Junior Honor Society, Rachel's Challenge, Science League, Student Council
Arts and Music Programs:
Chorus, Dance Team, Theater Company
School Notes
Shaping authentic men and women of talent and faith. St. Mary's
strives to form leaders who love God, work hard and are
compassionate toward others. We enable our students to develop
their intellectual, moral and physical talents to acquire a more
perfect sense of individual responsibility, a correct use of
freedom and a capacity for productive participation in society.
Our pillars for success:
Our pillars for success:
- CATHOLIC We provide faith-based education that promotes the values of community and service to others
- EXCELLENCE We offer a quality college-preparatory education in a learning environment where students are held to rigorous academic standards
- INTEGRITY We encourage students to participate in extracurricular activities to develop leadership, perseverance and collaborative excellence
- RESPECT Our faculty recognizes the individuality of each student and work together to fully prepare students for future endeavors
- Sample of notable school alumni/alumnae:
- Daniel Lobo - Graduate of Harvard University, PhD student in Sociology at UC Berkeley. -
- Joan Luise Hill - Co-author of books such as The Miracle Chase, owning a winery in Carmel Valley, CA. -
Source: Verified school update
Frequently Asked Questions
How much does St. Marys High School cost?
St. Marys High School's tuition is approximately $21,100 for private students.
What is the acceptance rate of St. Marys High School?
The acceptance rate of St. Marys High School is 98%, which is higher than the national average of 71%.
Who are famous alumni from St. Marys High School?
St. Marys High School famous alumni include: Daniel Lobo - Graduate of Harvard University, PhD student in Sociology at UC Berkeley. and Joan Luise Hill - Co-author of books such as The Miracle Chase, owning a winery in Carmel Valley, CA..
What sports does St. Marys High School offer?
St. Marys High School offers 16 interscholastic sports: Baseball, Basketball, Cheering, Cross Country, Football, Golf, Ice Hockey, Lacrosse, Soccer, Softball, Swimming, Tennis, Track and Field, Volleyball, Weightlifting and Winter Track. St. Marys High School is ranked as one of the top 20% of private schools in Massachusetts for most sports offered.
What is St. Marys High School's ranking?
St. Marys High School ranks among the top 20% of private schools in Massachusetts for: Largest student body, Most sports offered and Oldest founding date.
When is the application deadline for St. Marys High School?
The application deadline for St. Marys High School is rolling (applications are reviewed as they are received year-round).
School Reviews
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