Middlesex School (2026 Profile)

5.00 (29 reviews)

Tel: (978) 371-6524

1400 Lowell Road
Concord, MA 01742

www.mxschool.edu

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Middlesex School Photo #1 - English Class

Middlesex School Photo #2 - Football in the Fall

Middlesex School Photo #4 - Science Labs

Middlesex School Photo #5 - Middlesex Theatre

Middlesex School Photo #6 - Ice Hockey in the Winter

Middlesex School Photo #7 - The Dining Hall at lunchtime

Middlesex School Photo #8 - Crew in the Spring

Middlesex School Photo #9 - Impromptu Whiffle ball game on the Circle

Middlesex School Photo #10 - Plaque Carving

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: 425 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:

School Overview

| 2025 School Data

Middlesex School

Boarding School Avg.

School Focus

College Preparatory

Grades Offered

9-12

School Type

Co-ed

Year Founded

1901

1909

Campus Size

350 acres

125 acres

School Calendar

View School Calendar

School Motto

Find the promise that lies hidden in every student.

Student Body

Enrollment

425 students

300 students

% Students of Color

44%

25%

% International Students

13%

20%

% Students Boarding

72%

70%

Average SAT Score

1480
(Out of 1600)

* National Avg. »View

Average ACT score

32
(Out of 36)

*National Avg. »View

Offers Post-Grad Year

Academic Profile

Saturday Classes

Yes

Frequency of Saturday Classes

Weekly

Classroom Dress Code

Casual
No dress code

Casual

Average Class Size

12 students

* National Avg. »18

Student-Teacher Ratio

4:1

7:1

# of AP / Advanced Courses Offered

ESL Courses Offered

Yes

% Faculty with Advanced Degree

80%

70%

Summer Program Offered

Yes

Accreditations

The Association of Boarding Schools (TABS)

# of AP / Advanced Courses Offered

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

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Tuition & Financial Aid

Endowment Size

$301.5 million
(Includes Endowment & Long term investments)

$25 million

Yearly Tuition
(Boarding Students)

$75,475
(No additional fees)

$59,900

Yearly Tuition
(Day Students)

$61,270
(No additional fees)

$33,500

% Students on Financial Aid

34%

40%

Avg. Financial Aid Grant

$52,560
(Need-based aid)

$25,000

Admissions

Application Deadline

Jan. 15

Accepts Standardized Application (SAO and/or Gateway)

Yes

SSAT Required

Yes

Average Percentile SSAT

90%

Acceptance Rate

18%

58%

Director of Admissions

Douglas C. Price

Application URL

Online Application

Sports

# Interscholastic Sports Offered

Sports

Alpine SkiingBaseball

Track and FieldVolleyball

Wrestling

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Extracurriculars

Total Extracurricular Organizations

Extracurriculars

Club or Organization:

7v7 Football ClubAI (Artificial Intelligence) Club

Allies Against Racial InjusticeArchitecture and Design

Astronomy ClubBaking club

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

Film ClubFinance club

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

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College Matriculation

10 Most Popular College Choices (# Enrolled)

Boston College

University of Chicago

Georgetown University

New York University

Harvard University

Dartmouth College

Trinity College

Bowdoin College

Colby College

Tufts University

View Matriculation Data

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.
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

Source: Verified school update

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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 School is 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 School Alumni #1
Class of 2019
5.008/18/2020
Boston University

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. . .

Middlesex School Alumni #2
Class of 2018
5.004/27/2020
St. Lawrence University

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. . .

Middlesex School Alumni #3
Class of 2019
5.006/29/2019
UMass Lowell

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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