Middlesex School (informally known as MX) is a
coeducational
Mixed-sex education, also known as mixed-gender education, co-education, or coeducation (abbreviated to co-ed or coed), is a system of education where males and females are educated together. Whereas single-sex education was more common up to ...
,
independent
Independent or Independents may refer to:
Arts, entertainment, and media Artist groups
* Independents (artist group), a group of modernist painters based in Pennsylvania, United States
* Independentes (English: Independents), a Portuguese artist ...
, and
non-sectarian
Nonsectarian institutions are secular institutions or other organizations not affiliated with or restricted to a particular religious group.
Academic sphere
Many North American universities identify themselves as being nonsectarian, such as B ...
boarding secondary school located in
Concord,
Middlesex County, Massachusetts
Middlesex County is a county located in the Commonwealth of Massachusetts, United States. As of the 2020 census, the population was 1,632,002, making it the most populous county in both Massachusetts and New England and the 22nd most populou ...
. Founded in 1901 to educate the children of wealthy
Boston Brahmin
The Boston Brahmins are members of Boston's historic upper class. From the late 19th century through the mid-20th century, they were often associated with a cultivated New England accent, Harvard University, Anglicanism, and traditional Britis ...
families, Middlesex introduced a national scholarship program in 1935 and currently educates 425 students in grades 9-12 from 30 U.S. states and 22 countries.
History
Middlesex School was founded in 1901 by Frederick Winsor, a native of Massachusetts who had previously served as the founding headmaster of
Gilman School
Gilman School is an all-boys independent school, independent, day school, day, college preparatory school located in the Roland Park neighborhood of Baltimore, Maryland, United States. There are three school divisions: Lower School, grades pre ...
in
Baltimore
Baltimore is the most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 census and estimated at 568,271 in 2024, it is the 30th-most populous U.S. city. The Baltimore metropolitan area is the 20th-large ...
. He was backed by a coterie of wealthy Bostonians, including his brother
Robert
The name Robert is an ancient Germanic given name, from Proto-Germanic "fame" and "bright" (''Hrōþiberhtaz''). Compare Old Dutch ''Robrecht'' and Old High German ''Hrodebert'' (a compound of ''Hrōþ, Hruod'' () "fame, glory, honour, prais ...
(the managing partner of the
Kidder, Peabody investment bank),
Francis Cabot Lowell,
Norwood Penrose Hallowell,
William Cameron Forbes
William Cameron Forbes (May 21, 1870 – December 24, 1959) was an American investment banker and diplomat. He served as governor-general of the Philippines from 1909 to 1913 and ambassador of the United States to Japan from 1930 to 1932.
Ear ...
,
Henry Lee Higginson, and
Charles Jackson Paine, the latter of whom donated the land for the school's campus.

Winsor and his family played a role in the
country day school movement
The Country Day School movement is a movement in progressive education that originated in the United States during the late 19th century. Country Day Schools sought to recreate the educational rigor, atmosphere, camaraderie and character-building ...
. Middlesex masters trained by Winsor went on to establish
Belmont Hill School, Boston Country Day School (a predecessor of
Rivers School), and Fenn School—three private day schools in Greater Boston. In addition, Winsor's sister Mary founded the
Winsor School, an all-girls day school in Boston (though not a country day school). Today, 28% of Middlesex students are day students,
a larger percentage than at any of the other
St. Grottlesex schools.
A former financial aid student at
Harvard College
Harvard College is the undergraduate education, undergraduate college of Harvard University, a Private university, private Ivy League research university in Cambridge, Massachusetts, United States. Part of the Harvard Faculty of Arts and Scienc ...
, Winsor introduced a regional scholarship program in 1935, which waived up to two-thirds of tuition and fees for students across the country.
[Fortmiller, pp. 331-33.] The scholarships were explicitly modeled on the scholarship program introduced at Harvard the previous year, and sought to broaden the geographic reach of the student body. Eventually, one-sixth of Middlesex students were recruited through this scholarship program.
Today, one-third of Middlesex students are on scholarship,
and the student body comes from 32 U.S. states and 20 countries.
Middlesex admitted its first black students in 1964 and its first female students in 1974.
Unitarianism and Harvard

Middlesex was founded to "meet the needs of the large body of
Unitarian parents who
ee not wholly satisfied to send their boys to the so-called
Episcopal Church (United States)">Episcopal">Episcopal_Church_(United_States).html" ;"title="nowiki/>
EpiscopalChurch schools" like
St. Paul's,
St. George's,
St. Mark's, and
Groton. (Although Groton's founder Endicott Peabody (educator)">Endicott Peabody had come from an established Unitarian family, he converted to Episcopalianism in college, to his mother's dismay;
his family members donated a Middlesex dormitory.) Although the school has always been nonsectarian, the founding trustees were all Unitarian, and students were required to attend (nonsectarian) on-campus chapel services until the 1960s. Today, Middlesex's chapel hosts secular school meetings on Wednesdays, and there are no regular religious services.
Middlesex's connection to Unitarianism (and Boston's wealthy
Boston Brahmin
The Boston Brahmins are members of Boston's historic upper class. From the late 19th century through the mid-20th century, they were often associated with a cultivated New England accent, Harvard University, Anglicanism, and traditional Britis ...
families, many of whom were Unitarians) led to a profitable relationship with Harvard University, which had been unofficially Unitarian since the Andover Theological Seminary#History">"Unitarian Controversy" in the early 1800s. Harvard president
Charles Eliot (the namesake of a Middlesex administrative building) was an early backer of the school, and Harvard dean
LeBaron Russell Briggs was a founding member of the Middlesex board of trustees; both of them were Unitarians. (In fact, at the time Middlesex was founded, Eliot's son
Samuel
Samuel is a figure who, in the narratives of the Hebrew Bible, plays a key role in the transition from the biblical judges to the United Kingdom of Israel under Saul, and again in the monarchy's transition from Saul to David. He is venera ...
was president of the
American Unitarian Association
The American Unitarian Association (AUA) was a religious denomination in the United States and Canada, formed by associated Unitarian congregations in 1825. In 1961, it consolidated with the Universalist Church of America to form the Unitarian ...
.) Frederick Winsor tailored the Middlesex curriculum to Harvard's entrance requirements and ensured that many of the teachers were Harvard graduates. In 1967, Middlesex placed more students at Harvard, Yale, and Princeton (as a percentage of the graduating class) than all but one New England boarding school. However, Harvard's connection to Unitarianism eroded over time. By 1983,
Unitarian Universalists
Unitarian Universalism (abbreviated UUism or UU) is a Religious liberalism, liberal religious tradition characterized by its commitment to theological diversity, inclusivity, and social justice. Unitarian Universalists do not adhere to a single ...
comprised only 28 out of
Harvard Divinity School
Harvard Divinity School (HDS) is one of the constituent schools of Harvard University in Cambridge, Massachusetts. The school's mission is to educate its students either in the religious studies, academic study of religion or for leadership role ...
's 380 students.
Nonsectarianism and the student body
Middlesex is the only nonsectarian member of
St. Grottlesex, an informal grouping of five schools historically associated with upper-class
White Anglo-Saxon Protestant
In the United States, White Anglo-Saxon Protestants or Wealthy Anglo-Saxon Protestants (WASP) is a Sociology, sociological term which is often used to describe White Americans, white Protestantism in the United States, Protestant Americans of E ...
culture. Its combination of Eastern Establishment prestige and religious permissiveness made it attractive to Jewish, Catholic, and Southern Baptist families who wanted their children to attend an elite boarding school, but not an Episcopalian one. The school did not build an on-campus chapel until 1925, and in the 1940s a proposal to place a Christian altar and cross in the chapel was quietly shelved. (When the 1992 film ''
School Ties'' was shot at Middlesex, the producers had to supply their own altar and cross, as the school did not have any.)

The school developed close ties with several notable Jewish families. Investment banker
Jacob Schiff
Jacob Henry Schiff (born Jakob Heinrich Schiff; January 10, 1847 – September 25, 1920) was a German-born American banker, businessman, and philanthropist. He helped finance the expansion of American railroads and the Japanese military efforts a ...
had previously declined to send his son
Mortimer to Groton because although Groton would admit Mortimer, it would not excuse him from Sunday chapel. Schiff's daughter married into the
Warburg family
The Warburg family is a prominent German and American banking family of German Jewish and originally Venetian Jewish descent, noted for their varied accomplishments in biochemistry, botany, political activism, economics, investment banking, law, ...
, and Schiff steered his grandchildren to Middlesex. The Warburgs eventually built the school library, and their
Rothschild
Rothschild () is a name derived from the German ''zum rothen Schild'' (with the old spelling "th"), meaning "to the red shield", in reference to the houses where these family members lived or had lived. At the time, houses were designated by signs ...
relatives also patronized Middlesex. (Although Schiff's business partner
Otto Kahn did send his son to Groton, Kahn—unlike Schiff—was not religiously observant.)
From the beginning, Middlesex also attracted families from the
American South
The Southern United States (sometimes Dixie, also referred to as the Southern States, the American South, the Southland, Dixieland, or simply the South) is census regions United States Census Bureau. It is between the Atlantic Ocean and the ...
. Due to its financial reliance on white Southern families, Middlesex was one of the last major New England boarding schools to admit black students, doing so in 1964. (Middlesex had admitted its first Asian student in 1938.) After rejecting
Booker T. Washington
Booker Taliaferro Washington (April 5, 1856November 14, 1915) was an American educator, author, and orator. Between 1890 and 1915, Washington was the primary leader in the African-American community and of the contemporary Black elite#United S ...
's son in 1902, Frederick Winsor apologetically explained to Washington that "we have the wishes of the parents to consider as well, and we shall have boys next year from as far south as Augusta, Georgia .... Unfortunately for us, our ambition to be something more than a mere local institution[] brings us face to face with the traditions and prejudices of every section of the country."
Today, 32% of Middlesex students identify as people of color and 12% of Middlesex students come from abroad.
The current president of the board of trustees is Jason Robart, an African-American who graduated from Middlesex in 1983.
Campus and facilities
The Middlesex School campus is located in
Concord, Massachusetts
Concord () is a town in Middlesex County, Massachusetts, United States. In the 2020 United States census, 2020 census, the town population was 18,491. The United States Census Bureau considers Concord part of Greater Boston. The town center is n ...
, about 20 miles outside of
Boston
Boston is the capital and most populous city in the Commonwealth (U.S. state), Commonwealth of Massachusetts in the United States. The city serves as the cultural and Financial centre, financial center of New England, a region of the Northeas ...
.
[About MX](_blank)
/ref> The campus was designed by the Olmsted Brothers
The Olmsted Brothers company was a Landscape architecture, landscape architectural firm in the United States, established in 1898 by brothers John Charles Olmsted (1852–1920) and Frederick Law Olmsted Jr. (1870–1957), sons of the landscape ar ...
architectural firm, and the firm Peabody and Stearns designed most of the main buildings. Most of the campus buildings are located around The Circle, a grassy field at the center of the campus.
Classes are taught in Eliot Hall (the humanities building and administrative center); the Clay Centennial Center (the math and science building); and the Rachel Carson Music and Campus Center. Warburg Library contains 48,000 books, additional classroom space, and the school archives. In addition, the Bass Arts Pavilion contains two theaters, a gallery, and studio spaces for visual arts.
Ware Hall houses the dining hall and student center. Middlesex offers four boys' dormitories (Clay, Landry, Robert Winsor, and Atkins) and five girls' dormitories (Bryant-Payne, Higginson, Hallowell, LeBaron Briggs, and Kravis).
Middlesex's athletic facilities include seven playing fields (five grass and two artificial turf), a wrestling room, a dance studio, a baseball diamond, eight outdoor tennis courts, eight squash courts, two basketball courts, a hockey rink, a boathouse and pond for crew, and a fitness center.
Finances
Tuition and financial aid
Tuition and fees for the 2024-2025 academic year are $75,475 for boarding students and $61,270 for day students. 32% of the student body is on financial aid, and the average aid grant is $56,731. 27% of students receiving financial aid (~8.6% of the student body) have household incomes under $100,000; for these students, the average grant is $66,767.
Endowment and expenses
Middlesex's financial endowment stands at $220 million. In its Internal Revenue Service
The Internal Revenue Service (IRS) is the revenue service for the Federal government of the United States, United States federal government, which is responsible for collecting Taxation in the United States, U.S. federal taxes and administerin ...
filings for the 2021-22 school year, Middlesex reported total assets of $434.6 million, net assets of $357.7 million, investment holdings of $211.2 million, and cash holdings of $16.9 million. Middlesex also reported $33.3 million in program service expenses and $7.2 million in grants (primarily student financial aid
Student financial aid (or student financial support, or student aid) is financial support given to individuals who are furthering their education. Student financial aid can come in a number of forms, including scholarships, Grant (money), grants, ...
).
Academics
Curriculum
Middlesex has a 4:1 student-teacher ratio, and the average class size is 12. The school offers 23 Advanced Placement
Advanced Placement (AP) is a program in the United States and Canada created by the College Board. AP offers undergraduate university-level curricula and examinations to high school students. Colleges and universities in the US and elsewhere ...
classes.
Test scores
Among students who submitted test scores to colleges, the Class of 2024's average combined SAT
The SAT ( ) is a standardized test widely used for college admissions in the United States. Since its debut in 1926, its name and Test score, scoring have changed several times. For much of its history, it was called the Scholastic Aptitude Test ...
score was 1430 and its average combined ACT score was 33. In 2023, 234 students took 695 AP exams and passed 91% of them.
Extracurriculars
Athletics
Middlesex fields teams in 17 different sports and competes in the Independent School League. The fall sports are football, cross country, volleyball, soccer, and field hockey; the winter sports are wrestling, dance, squash, ice hockey, alpine skiing, and basketball; the spring sports are crew, lacrosse, baseball, tennis, track, and golf.
Middlesex's primary athletic rival is the St. George's School in Middletown, Rhode Island.
Community service
Middlesex offers several community service programs. Students may help clean up a soup kitchen at Open Table (weekly), serve food and clean at a food pantry at Cor Unum (on long weekends), talk to people at a home for the elderly at Walden House (weekly), visit the elderly at Sunday Visits (special schedule), and help small children learn to skate at Gazebo (special schedule). Every fall, all students participate in a Community Service Day instead of going to classes. Several student Community Service Officers, all seniors, help manage the program.
Juniors may participate in the Youth in Philanthropy Program, which focuses on teaching students the techniques behind philanthropy and provides $10,000 for the students to distribute to worthy causes annually.
Every summer, the school sponsors a community service trip to the Linawo Children's Home in South Africa, where students tour the surrounding area, learn about South African culture and history, and assist in the operation of the shelter.
Notable alumni
* Conrad Aiken – Pulitzer Prize-winning author and poet
* Paget Brewster – actress
*Steve Carell
Steven John Carell (; born August 16, 1962) is an American actor and comedian. He starred as Michael Scott in the NBC sitcom ''The Office'' (2005–2011, 2013), and also worked at several points as a producer, executive producer, writer, a ...
– actor and comedian
*Joseph S. Clark Jr.
Joseph Sill Clark Jr. (October 21, 1901January 12, 1990) was an American writer, lawyer and politician. A member of the United States Democratic Party, Democratic Party, he served as the 90th List of mayors of Philadelphia, Mayor of Philadelphia ...
– former U.S. Senator from Pennsylvania and mayor of Philadelphia
* James L. Halperin – numismatist and author
* William Hurt – Academy Award-winning actor
* Joseph Kahn – Managing editor, The New York Times
* Mark P. Lagon – American political scientist and human rights campaigner
* Mills Lane – Nevada Judge, D.A, TV personality, professional boxing referee
*Henry Cabot Lodge Jr.
Henry Cabot Lodge Jr. (July 5, 1902 – February 27, 1985) was an American diplomat and politician who represented Massachusetts in the United States Senate and served as United States Ambassador to the United Nations in the administration of Pre ...
– former U.S. Senator from Massachusetts and 1960 Republican vice presidential nominee
* Robin Moore – writer
* Charles Coudert Nast, attorney and U.S. Army major general
*Bill Richardson
William Blaine Richardson III (November 15, 1947 – September 1, 2023) was an American politician, author, and diplomat who served as the List of governors of New Mexico, 30th governor of New Mexico from 2003 to 2011. He was U.S. ambassador to ...
– former Governor of New Mexico and U.S. ambassador to the United Nations
* Bret Stephens – Op-ed columnist, The New York Times
*Cass Sunstein
Cass Robert Sunstein (born September 21, 1954) is an American legal scholar known for his work in U.S. constitutional law, administrative law, environmental law, and behavioral economics. He is also ''The New York Times'' best-selling author of ...
– former head of President Obama's Office of Information and Regulatory Affairs, Robert Walmsley University Professor at Harvard Law School, columnist at Bloomberg Opinion
* Robert Egerton Swartwout – author
*Kevin Systrom
Kevin Systrom (born December 30, 1983) is an American computer programmer and entrepreneur. He co-founded Instagram, along with Mike Krieger.
Systrom was included on the list of America's Richest Entrepreneurs Under 40 2016. Under Systrom as CE ...
– founder of Instagram
Instagram is an American photo sharing, photo and Short-form content, short-form video sharing social networking service owned by Meta Platforms. It allows users to upload media that can be edited with Social media camera filter, filters, be ...
* Shunsuke Tsurumi – Japanese philosopher
*Jessica Tuck
Jessica Tuck (born February 19, 1963) is an American actress, best known for her performances on television as Megan Gordon Harrison on the American Broadcasting Company, ABC soap opera ''One Life to Live'', Gillian Gray in the CBS drama series ...
– actress
*Chris Van Hollen
Christopher Van Hollen Jr. ( ; born January 10, 1959) is an American attorney and politician serving as the senior United States senator from Maryland, a seat he has held since 2017. A member of the Democratic Party, he served as the U.S. re ...
– senator from Maryland.
* Edward Warburg (1908–1992), philanthropist, patron of the arts.
* Frederick M. Warburg – investment banker
* Paul F. Warburg – investment banker
* William Weld – former Governor of Massachusetts, vice presidential candidate
References
External links
*
Profile on Boarding School Review.com
Middlesex Graduates for Estabrook Homepage
Two Middlesex Alumnae Protest Development of Estabrook
Middlesex School Summer Arts Website
{{authority control
1901 establishments in Massachusetts
Boarding schools in Massachusetts
Buildings and structures in Concord, Massachusetts
Co-educational boarding schools
Cummings and Sears buildings
Educational institutions established in 1901
Independent School League
Peabody and Stearns buildings
Private high schools in Massachusetts
Private preparatory schools in Massachusetts
Schools in Middlesex County, Massachusetts