St. Mark’s School is a coeducational, Episcopal, preparatory school, situated on 250 acres in Southborough, Massachusetts, 25 miles from Boston. Founded in 1865 by Joseph Burnett, who developed and marketed the world-famous Burnett Vanilla Extract. St. Mark's is a member of the Independent School League, and the second-oldest of the five elite prep schools collectively termed St. Grottlesex.
The school's 65 teachers lead 365 boarding and day students through a rigorous curriculum and a full program of co-curricular activities. Class size averages 12, with a student-faculty ratio of 5:1. Each department offers honors and advanced courses.
John Warren, a 1974 St. Mark's graduate, is the current head of school.
Accredited by the New England Association of Schools and Colleges, St. Mark’s School more than 150 years old.