Middlesex School is located in Concord, MA. It is a private school that serves 374 students in grades 9-12. Middlesex School is coed (school has male and female students) and is nonsectarian in orientation. The school belongs to the National Association of Independent Schools.
In 2010, Middlesex School had 6 students for every full-time equivalent teacher. The Massachusetts average is 14 students per full-time equivalent teacher.