Founded in 1901, and located in one of this country's most historic towns, Concord, Massachusetts, Middlesex aspires to help its students "find their promise" through immersion in a rigorous academic program, inclusive extracurricular programs in arts and athletics, and a commitment to service. Middlesex students are exposed to a breadth and depth of opportunities typically found at only a much larger school.
Over 150 classes include five languages, a much emulated Writing Program, and over 50 advanced and AP sections that wil stretch students intellectually as they pursue academic passions.
At Middlesex, everyone engages in cocurricular life, participating in a thriving arts program (including a third of the school performing via vocal, instrumental or dramatic groups) that ofters opportunities for the beginner to high-end artist; similarly, each student participates in athletics, and we have a home for both the elite athlete and those new to team sports.
All of this work takes place in a community strengthened by our shared commitment to five core values: honesty, respect, kindness, gratitude, and courage.
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 420 students
- Yearly Tuition (Boarding Students): $75,475
- Yearly Tuition (Day Students): $61,270
- Acceptance rate: 18%
- Average class size: 12 students
- Application Deadline: Jan. 15
- Source: Verified school update
Top Rankings
Middlesex School ranks among the top 20 boarding schools (out of 307 schools) for:
Category
Attribute
Student Attention
School Resources
School Resources
Selectivity
Offering Breadth
Offering Breadth
Student Test Scores
Student Test Scores
Student Test Scores
School Overview
School Focus
College Preparatory
College Preparatory
Grades Offered
9-12
9-12
School Type
Co-ed
Co-ed
Year Founded
1901
1909
Campus Size
350 acres
125 acres
School Calendar
Student Body
Enrollment
420 students
300 students
% Students of Color
44%
25%
% International Students
12%
20%
% Students Boarding
72%
70%
Offers Post-Grad Year
No
No
Academics and Faculty
Saturday Classes
Yes
No
Frequency of Saturday Classes
Weekly
Weekly
Student-Teacher Ratio
4:1
7:1
# of AP / Advanced Courses Offered
61
17
ESL Courses Offered
No
Yes
% Faculty with Advanced Degree
80%
70%
Summer Program Offered
No
Yes
Tuition Cost
Endowment Size
$301.5 million
(Includes Endowment & Long term investments)
(Includes Endowment & Long term investments)
$25 million
Yearly Tuition
(Boarding Students)
(Boarding Students)
$75,475
(No additional fees)
(No additional fees)
$59,900
Yearly Tuition
(Day Students)
(Day Students)
$61,270
(No additional fees)
(No additional fees)
$33,500
% Students on Financial Aid
34%
40%
Avg. Financial Aid Grant
$52,560
(Need-based aid)
(Need-based aid)
$25,000
Merit Scholarships Offered
No
No
Admissions
Application Deadline
Jan. 15
Jan. 15
SSAT Required
Yes
Yes
Average Percentile SSAT
90%
-
Acceptance Rate
18%
58%
Director of Admissions
Douglas C. Price
AP / Advanced Courses
# of AP / Advanced Courses Offered
61
17
Courses
Advanced Approaches to ActingAdvanced Astronomy
Advanced Data StructuresAdvanced French--The Francophone World
Advanced Greek LiteratureAdvanced Photography
Advanced Studies in Latin LiteratureAdvanced Studies in Latin Poetry
Advanced Studio ProjectsAdvanced Topics in Computer Science
Afro-American HistoryAP Art History
AP BiologyAP Calculus AB
AP Calculus BCAP Chemistry
AP ChineseAP Computer Science
AP English LiteratureAP Environmental Studies
AP European HistoryAP French Language
AP Government and PoliticsAP Latin ( Vergil)
AP MacroeconomicsAP Microeconomics
AP Music TheoryAP Physics 1
AP Physics 2AP Physics C
AP Spanish LanguageAP Spanish Literature
AP StatisticsAP Studio Art
AP U.S. HistoryArt and Life in Nineteenth-Century France
British Romantic LiteratureEngineering
Era of the American Civil WarFantasy Literature in English
Fiction WritingForms of Poetry
Global. StudiesHistory of Dissent
Jane AustenModern American Poetry
Multivariable CalculusNarratives of Nationhood
Nature Writing: Thoreau and EmersonPostcolonial Literature
Seminar in Advanced Computer ScienceSeminar in Advanced Mathematics
Studies in Medieval LiteratureThe American Romantic Tradition
The Harlem RenaissanceThe Hero in 20th Century Literature
The Novel after ModernismThe Personal Essay
Utopias and DystopiasVector Calculus
War and Reconciliation
Sports
# Interscholastic Sports Offered
17
16
Extracurriculars
Total Extracurricular Organizations
71
23
Extracurriculars
Club or Organization:
7v7 Football ClubAI (Artificial Intelligence) Club
Allies Against Racial InjusticeArchitecture and Design
Book Lovers’ ClubBotany Club
Campuses Against CancerCards for Kids
Clash of Clans clubClassical Music Club
Classics clubComic Book Club
Common senseComputer Programming Club
Country Music ClubCreative Writing Club
Crypto ClubDebate Club
decaDeFi Club
EQ: science magazineFemX
Fishing ClubFocus
French ClubFriendship bracelet club
Gazebo Skating ClubGirls with Gains
GSA (Gender and Sexuality Alliance)Harry Potter Club
I saw the sign (asl club)Improv Club
Jewish Student UnionJiu Jitsu club
Kickball ClubKnitting Club
Lifting clubMarine Biology Club
Math ClubMeats and Beats
Mindfulness (Morning Mindfulness)Minecraft club
Moodle Development TeamMusic Appreciation Club
MX Swim TeamMXSpike (Spikeball Club)
MXTVOrigami Club
Outdoors ClubPeace of Mind
Pen Pal ClubPhotography Club
PICKLEBALL CLUBPing Pong Club
Poi ClubPolitics Club
RoboticsSending a Smile
Sports Analytics ClubStar Wars Club
Studio Art ClubThe Anvil
The Hammer PodcastThe Iris
Ultimate Frisbee ClubVideo Production Club
Writing for Social Justice and Change
College Matriculation
10 Most Popular College Choices (# Enrolled)
Boston College
21
University of Chicago
20
Georgetown University
17
New York University
17
Harvard University
16
Dartmouth College
15
Trinity College
14
Bowdoin College
13
Colby College
13
Tufts University
13
School Notes
- Middlesex School Mission and History
- Frederick Winsor wanted the school he founded in 1901 to be distinct from the church-affiliated boarding schools of the time, and from its beginnings, Middlesex School has occupied a unique place in the independent school landscape. It is a non-sectarian School with a positive sense of tradition and mission. It is a school with small-school intimacy and big-school opportunity, a school that early on sought students from every part of the country through a National Scholarship Program. As it has grown, Middlesex has broadened its national and international reach while always benefiting from its local surroundings-the human and cultural capital of the Boston/Cambridge area. Middlesex School, both in the present and in the past, has preferred capacity in many areas to specialization in one. We believe a transparent and familiar community is an ethical community. We believe in our students. From the start, Winsor`s mission was to "find the promise that lies hidden" in every student, and that message of individuality, hope, and possibility guides us today. Our campus, designed by the Olmsted Brothers firm, remains centered on its iconic circle. We are fortunate to live in a beautiful setting that naturally brings our paths and our lives together. Radiating from a common sense of place and purpose, Middlesex continues to prepare its students for a changing world. We have evolved in many ways since our founding over a century ago. We have undergone renovation, conservation, expansion, and constant transition in person and place. Yet our buildings, our fields, our programs, and our ethos still cleave to a human scale fostering collegiality and contact. Despite the school`s continuous transformation, our mission, with our students at the center, remains the same.
- Middlesex School accreditations: New England Association of Schools and Colleges (NEASC)
- Sample of notable school alumni/alumnae:
- Steve Carell - Actor
- Kevin Systrom - Co-founder of Instagram
- Sarah Leary - Cofounder of Nextdoor
- William Hurt - Academy Award Winning Actor
- Anthony Lake - Executive Director, Unicef
- Li Chung Pei - Architect
- Cass Sunstein - Head of the Office of Information and Regulatory Affairs
- Sarah Leary - Co-Founder of Nextdoor
- Martin Hoffman - US Secretary of the Army
- Joseph Kahn - Managing Editor, The New York Times
- School Motto: Find the promise that lies hidden in every student.
Source: Verified school update
Frequently Asked Questions
How much does Middlesex School cost?
Middlesex School's tuition is approximately $75,475 for boarding students and $61,270 for day students.
What schools are Middlesex School often compared to?
Middlesex Schoolis often viewed alongside schools like Deerfield Academy, Phillips Academy Andover by visitors of our site.
What is the acceptance rate of Middlesex School?
The acceptance rate of Middlesex School is 18%, which is lower than the boarding school average of 58%. Middlesex School's acceptance rate is ranked as one of the top boarding schools with low acceptance rates.
Who are famous alumni from Middlesex School?
Middlesex School famous alumni include: Steve Carell, Kevin Systrom, Sarah Leary, William Hurt, Anthony Lake, Li Chung Pei, Cass Sunstein, Sarah Leary, Martin Hoffman and Joseph Kahn.
What sports does Middlesex School offer?
Middlesex School offers 17 interscholastic sports: Alpine Skiing, Baseball, Basketball, Crew, Cross Country, Dance, Field Hockey, Football, Golf, Ice Hockey, Lacrosse, Soccer, Squash, Tennis, Track and Field, Volleyball and Wrestling.
What is Middlesex School's ranking?
Middlesex School ranks among the top 20 boarding schools for Low student-teacher ratio, Large financial endowment, Highest endowment/student, Low acceptance rates, Most extracurriculars offered, High # of AP/advanced courses offered, High average SAT scores, High SSAT scores and High ACT scores.
When is the application deadline for Middlesex School?
The application deadline for Middlesex School is Jan. 15.
Alumni Reviews Review School
Review
Description
Middlesex is probably the boarding school that is far ahead in terms of student body diversity, and I mean that in a very good way. Between geographical and socioeconomic diversity, you really learn a ton. . .
Great level of focus on developing clear and cohesive writing skills. Write countless essays and spend time working on the technicalities that improve your ability. Great long-standing traditions. We have a beautiful circle that allows. . .
The entire experience was not only unique, it was life changing! It opened my eyes and mind up to world I wasn't familiar with. I was able to meet, connect and bond with students from. . .
Show more reviews (26 reviews)
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The nearest boarding school to Middlesex School is The Cambridge School of Weston (9.2 miles away)
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