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Mr. Sullivan congratulates a graduate

ABOUT ST. SEBASTIAN'S SCHOOL

Committed to the pursuit of truth through faith and reason, St. Sebastian's is a Catholic independent day school for 380 young men in grades seven through twelve. With an average class size of 10 and a student/faculty ratio of 7:1, St. Sebastian's offers a program of academic rigor and spiritual depth with excellence in the arts and athletics.

OUR MISSION

As the only Catholic independent school in the ISL, St. Sebastian's is a mission-driven school.
 

STRATEGIC PLAN

St. Sebastian’s Strategic Plan outlines the School’s goals and priorities in the years ahead. 
 

OUR HISTORY

St. Sebastian's was founded by Cardinal William O'Connell in 1941 based on the country day school model.

LEARN MORE

 St. Sebastian’s is a community where boys push themselves, develop deep relationships and respect for others, grow in their faith, and learn what it means to be a gentleman of courage, honor, and wisdom. 

- BRENDAN SULLIVAN, HEAD OF SCHOOL