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Drone photo of St. Sebastian's campus
A Glimpse of St. Sebastian's
A Glimpse of St. Sebastian's

The best way to experience the mission of St. Sebastian's is by visiting our campus in person. In the meantime, here is a glimpse of life on Greendale Avenue, from the classroom to the chapel, in the library, and on the fields.


Welcome to St. Sebastian’s

Offering the best of the Catholic and Independent School traditions, St. Sebastian’s is an inclusive community of academic excellence and faith in which every person is known, loved, and called to greatness. We are delighted that you are interested in learning more about our School, and we encourage you to connect with us to experience the mission and spirit of the St. Sebastian’s community.

Our Admissions staff is here to guide you every step of the way.



100% of an admitted student’s demonstrated financial need is met with financial aid


average classroom size


members of our faculty have served 20 or more years


of students receive need-based financial aid


bus lines offering transportation to School


of students are students of color


student to teacher ratio

Why St. Sebastian’s?

“Your son will be known, loved and called to greatness by great people.”

“The student-faculty relationship at St. Sebastian’s is really powerful. It animates everything we do.”

“What makes St. Sebastian’s so distinctive is its commitment to developing the whole person.”

“St. Sebastian’s showed me another level of hard work.”

Questions? We’re here to help. Call us at 781.247.0125.