St Mark's School is located in Southborough, MA. It is a private school that serves 338 students in grades 9-12. St Mark's School is coed (school has male and female students) and is Episcopal in orientation. The school belongs to the National Association of Episcopal Schools.
In 2010, St Mark's School had 7 students for every full-time equivalent teacher. The Massachusetts average is 14 students per full-time equivalent teacher.