St. Mark's School

Southborough, MA

Financials

Source year 2026—2027 · Tuition source · Verified August 13, 2026

Day tuition (2026—2027)

$66,700

Boarding tuition (2026—2027)

$82,300

Financial aid

40% of students

Enrollment

360

Student:Teacher

6:1

Founded

1865

What St. Mark's School actually costs

Estimates — verify with the school

Published tuition is only part of the picture. This projection adds the costs families actually pay (tuition source year 2026—2027), with ~4%/yr tuition inflation.

Program

Distance from home

Years attending

Expected financial aid0% of tuition

40% of students at this school receive aid. Use the school's net price calculator for your family's real number.

Year 1 real cost

$91,000

vs $82,300 published tuition

4-year total

$385,882

incl. $36,398 beyond tuition

Hidden costs per year

Books, laptop & course materials$800
Athletics gear & team fees$900
Activities, trips & event fees$1,200
Travel home & breaks$2,000
Dorm setup & storage$400
Spending money & incidentals$2,400
Health & student fees$1,000

About

St. Mark's School is a co-ed boarding and day school in Southborough, Massachusetts with a long-standing rivalry with Groton School dating to 1886. Known for academic rigor, strong arts, and a close residential community with consistent placement at highly selective colleges.

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