Offices & Resources

School Profile

  • 375 students
  • Approximately 100 new students enroll each year.
  • 75% boarding and 25% day.
  • 21% International Students
  • St. Mark's students hail from 24 states and 10 countries
Class Size

  • The average Class size is 12 students
  • 6/1 Student-Faculty ratio

Academic Schedule

St. Mark's operates on a two-semester calendar year with exams in January and June. A minimum load of five courses is required; it is highly unusual for a student to carry six courses. Classes meet six days a week, including half-days on Wednesday and Saturdays. A full day is divided into eight periods, varying in length from 20 to 80 minutes.

Boarding Tuition  $69,960
Day Tuition  $55,710



Diploma Requirements

In order to graduate, students must complete four years of English, one year of courses in both the arts and religion, three years in mathematics (Algebra I, Algebra II and Geometry), three years of one language, two years of lab science, and U.S. History.


  • St. Mark’s is accredited by the New England Association of Schools and Colleges (NEASC). Affiliations include the National Association of Independent Schools, the College Entrance Examination Board, and the National Association for College Admission Counseling.
Leadership opportunities

St. Markers have ample opportunity to assume leadership roles. Each year, eight VIth Formers lead the student body as monitors — senior members of Student Congress that run twice-weekly school meetings and meet weekly with the deans and head of school. The Admission Office selects a number of students to aid its efforts, as admission prefects, big brothers and sisters to incoming students, and orientation team members. Leadership opportunities also exist through the Alumni/ae Office, the chapel program, the Deans’ Office, and dormitories. To prepare St. Markers for the many opportunities available, the dean of students conducts spring and fall leadership training sessions to assist students in developing skills and to encourage them to engage in strategic planning.

Dress Code

While we do not require coats and ties, we do expect our students to conform to a dress code best described as “neat casual.” You may view the Student Handbook for more details


St. Mark's is affiliated with the Episcopal Church and rooted in that tradition. At the same time, our students, faculty and staff come from many varied faith and non-faith traditions, and we encourage and support them in that diversity. Our required twice-weekly chapel service is open and interfaith in style and structure. It is not a church service but a school chapel service, hosting a variety of student, faculty and outside speakers and performers. St. Mark's students are also required to study World Religions and Philosophy or Ethics for two semesters.

Financial Aid


St. Mark’s offers need-based financial aid to meet the difference between what a family can afford and the cost of tuition, room, and board. For the 2021-2022 school year, St. Mark’s awarded over $6 million in need-based financial aid. Grants ranged from $10,000 to over $65,000.