Intentionally small, thinking big.

Nestled on 210 acres in Southborough, Massachusetts, just 25 miles from Boston, St. Mark’s School is a coeducational, Episcopal boarding and day school committed to excellence in education and community life.

Founded in 1865 by Joseph Burnett, St. Mark’s is one of New England’s oldest independent boarding schools and a proud member of the Independent School League.

With 81 dedicated faculty members and an average class size of 11, our 372 students benefit from a personalized learning environment and a robust academic program that includes honors and advanced-level courses across every department. The 6:1 student-to-faculty ratio ensures close mentorship and meaningful relationships inside and outside the classroom.

Beyond academics, students engage in a vibrant co-curricular programs, from the arts to athletics, designed to develop well-rounded individuals ready to lead lives of consequence.

St. Mark’s is led by Head of School Dr. Ivory D. Hills and is accredited by the New England Association of Schools and Colleges.