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birds eye view of campus


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 visit our campus 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?

“At St. Sebastian’s, the teacher-coach model is extremely important. It helps to model what it means to be a whole person.”

“St. Sebastian’s not only offers the vital qualities of a great prep school, but also includes an ethical and religious emphasis that truly sets it apart.”

"If you told me in 7th grade I would be at Harvard studying pre-med, I would have told you it was impossible."

“Not all learning occurs in the classroom and I wanted my boys to go to a school in which the teachers are totally invested in them.”

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