St. Sebastians School
Independent Catholic school · Grades 7–12
Needham, MA
1191 Greendale Ave, Needham, MA 02492
Overall grade: A+
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- A+Class size
- B+Years serving families
- A-Diversity
What stands out
- The only all-boys school in Needham
- Smaller classes than 96% of Catholic schools in Massachusetts
St. Sebastians School is an independent Catholic school in Needham, Massachusetts, for students from 7th grade through 12th grade. It has about 388 students and around 5 students per teacher, smaller classes than 96% of Catholic high schools in Massachusetts. The school is an all-boys school and is part of the Archdiocese of Boston. Students attend about 7 hours a day, 160 days a year.
At a glance
- Grades
- Grades 7–12
- Students
- 388
- Teachers
- 74.8 (full-time equivalent)
- Students per teacher
- 5.2
- Boys and girls
- All boys
- Religious affiliation
- Catholic · Independent Catholic school
- Diocese
- Archdiocese of Boston
- School day
- About 7 hours
- School year
- 160 days
- Library
- Yes
Reviews
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How it compares
- Smaller classes than 96% of Catholic high schools in Massachusetts (5 students per teacher).
- A smaller school: fewer students than 65% of Catholic high schools in Massachusetts.
- Compared with 23 Catholic high schools in Massachusetts.
Students by survey year
Total students reported in official records since 2011–12.
Students by grade
Student body
Member of
- National Catholic Educational Association
- National Association of Independent Schools
Questions to ask on a tour
- What is tuition, and what does it include (books, fees, uniforms, trips)?
- Do you offer financial aid, sibling discounts or payment plans?
- Do you accept ESA, voucher or tax-credit scholarship funds?
- How big are classes in my child's grade?
- What support is there for students who need extra help or more challenge?
- Is the school accredited, and by whom?
- What do a typical day and a typical week look like?
- How does the school communicate with families?
Questions about St. Sebastians School
What grades does St. Sebastians School serve?
St. Sebastians School serves grades 7–12.
How many students attend St. Sebastians School?
About 388 students, with 5 students per teacher, according to official records.
How much is tuition at St. Sebastians School?
Call the school to ask about tuition, financial aid and payment plans.
Official record · Updated October 2026 · Official search · Something wrong? Tell us
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