Boarding School Review - Established 2003
Washington Academy
Cheshire Academy
Westtown School

Oldest Founding Date

The average founding year across the 95 ranked boarding schools with 200-400 students is 1906 (2026-27).
Among boarding schools with 200-400 students, the one with the oldest founding date is Washington Academy, with 1792.

Quick Facts (26-27)

  • # Schools with 200-400 Students Ranked: 95
  • Top 20 Range (Year Founded): 1792–1854
  • Schools with 200-400 Students Avg.: 1906

Quick Facts (26-27)

  • # Schools with 200-400 Students Ranked: 95
  • Top 20 Range (Year Founded): 1792–1854
  • Schools with 200-400 Students Avg.: 1906
Show school map — National (Year Founded range: 1792–2022, avg 1906)
Year Founded Range: 1792 2022 Avg. Year Founded: 1906

Oldest Founding Date (2026-27)

Among Schools with 200-400 Students (out of 95 schools)

Sorted by range (alphabetically within range)
Washington Academy Photo - Washington Academy, established in 1792, is one of the oldest day & boarding co-ed high schools in the USA. It is located on the Downeast Maine coast, and boast 425 total students from 25 different countries. The Alumni Building is one of nine buildings on its 75+ acre campus.
#1Washington Academy
Gr: 9-12, PG
PO Box 190, 66 Cutler Road
East Machias, ME 04630
(207) 255-8301
1792Year Founded
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Cheshire Academy Photo - Our 104 acre (0.42 sq km) campus is in the center of the quiet, beautiful Town of Cheshire, CT. Though just a two hour drive to both Boston and New York, Cheshire is a quiet small town where students are in walking distance of a few area shops and cafes.
#2Cheshire Academy
Gr: 9-12, PG
10 Main Street
Cheshire, CT 06410
(203) 439-7250
(5)
1794Year Founded
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Westtown School Photo - Campus Photo
#3Westtown School
Gr: 9-12 | PK-12 (day)
Quaker
975 Westtown Rd
West Chester, PA 19382
(610) 399-7900
(44)
1799Year Founded
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Wilbraham & Monson Academy Photo
#4Wilbraham & Monson Academy
Gr: 8-12, PG | 6-12, PG (day)
423 Main Street
Wilbraham, MA 01095
(413) 596-9107
(11)
1804Year Founded
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Kimball Union Academy Photo
#5Kimball Union Academy
Gr: 9-12, PG
7 Campus Center Drive
Meriden, NH 03770
(603) 469-2100
(6)
1813Year Founded
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Emma Willard School Photo
#6Emma Willard School
Gr: 9-12, PG
All-girls
285 Pawling Avenue
Troy, NY 12180
(518) 833-1320
(9)
1814Year Founded
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Brewster Academy Photo - Brewster Academy is a private, coeducational boarding and day prep school in New Hampshire serving students in grades 912 and postgraduate. Known for its supportive community and team-based learning approach, Brewster prepares diverse thinkers for lives of purpose through rigorous academics, meaningful relationships, and opportunities that extend well beyond the classroom.
#7Brewster Academy
Gr: 9-12, PG
80 Academy Drive
Wolfeboro, NH 03894
(603) 569-7200
(10)
1820Year Founded
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New Hampton School Photo - Beautiful, 340-acre campus
#8New Hampton School
Gr: 9-12, PG
70 Main Street
New Hampton, NH 03256
(603) 677-3401
(8)
1821Year Founded
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Kents Hill School Photo - Our idyllic, 400-acre campus is nestled in the midst of the Belgrade Lakes and provides sweeping views of the mountains of Maine and New Hampshire.
#9Kents Hill School
Gr: 9-12, PG
PO Box 257, 1614 Main St., Rte. 17
Kents Hill, ME 04349
(207) 685-1606
(1)
1824Year Founded
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Bishop's College School Photo - Our mission is simple: to create a caring community of learning and development where cultures connect and individuals matter. Our commitment to excellence in academics, wellness, athletics, creativity, and service contribute to a lifetime of engagement and global competence
#10(T10–T11)Bishop's College School
Gr: 7-12
80 chemin Moulton Hill
Sherbrooke, Quebec, Canada J1M 1Z8
(819) 566-0238
1836Year Founded
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Gould Academy Photo - Gould offers amazing outdoor opportunities in the Mountains of Western Maine and at Sunday River, but at it's core Gould is a traditional New England Boarding School with remarkable faculty mentors.
#10(T10–T11)Gould Academy
Gr: 9-12, PG
39 Church Street
Bethel, ME 04217
(207) 824-7777
(2)
1836Year Founded
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Pickering College Photo - Independent Co-educational Day and Boarding School
#12(T12–T14)Pickering College
Gr: 9-12
16945 Bayview Ave
Newmarket, Ontario, Canada L3Y4X2
(905) 895-1700
(4)
1842Year Founded
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Saint James School Photo - Founded in 1842, Saint James School is a coeducational, Episcopal boarding and day school for students in grades 8-12 located in Hagerstown, Maryland.
#12(T12–T14)Saint James School
Gr: 8-12
Episcopal
17641 College Road
Hagerstown, MD 21740
(301) 733-9330
1842Year Founded
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Saint Mary's School Photo - At Saint Mary's School, girls take center stage. We know girls and we know the all-girl learning environment at Saint Mary's School inspires girls to step outside their comfort zone, engage their minds, amplify their voices, and discover who they are and who they want to become!
#12(T12–T14)Saint Mary's School
Gr: 9-12
All-girls (Episcopal)
900 Hillsborough Street
Raleigh, NC 27603
(919) 424-4100
(1)
1842Year Founded
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Miss Porter's School Photo
#15Miss Porter's School
Gr: 9-12
All-girls
60 Main Street
Farmington, CT 06032
(860) 409-3530
(6)
1843Year Founded
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Tilton School Photo - Tilton School is an independent, coeducational, college preparatory school serving students from 9th to 12th grade and postgraduates. Tilton's student body of 220 consists of day students and boarding students from 19 states and 16 countries. Although the Tilton Experience is different for every student, it challenges all students to try new things, learn new skills, and try new things.
#16Tilton School
Gr: 9-12, PG
30 School Street
Tilton, NH 03276
(603) 286-1733
(1)
1845Year Founded
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Proctor Academy Photo - Students discover their sense of belonging on Proctor's beautiful New Hampshire campus, where our close-knit community helps each individual understand who they are and who they can become.
#17Proctor Academy
Gr: 9-12, PG
204 Main Street - P.O. Box 500
Andover, NH 03216
(603) 735-6652
(12)
1848Year Founded
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The Frederick Gunn School Photo - The Frederick Gunn School, founded in 1850, is a co-ed boarding and day school for 350 students in grades 9-12 as well as a post-graduate year located in Washington, Connecticut.
#18The Frederick Gunn School
Gr: 9-12, PG
99 Green Hill Road
Washington, CT 06793
(860) 868-7334
1850Year Founded
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Grier School Photo
#19Grier School
Gr: 7-12, PG | 5-12, PG (day)
All-girls
2522 Grier School Road
Birmingham, PA 16686
(814) 684-3000
(6)
1853Year Founded
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Saint Stanislaus High School Photo - We make the most of our location right on the Bay, developing unique programs, clubs, and activities for our students to enjoy. Our scuba and sailing clubs enjoy time in the water, while our environmental club focuses on care for our oceans, too.
#20Saint Stanislaus High School
Gr: 7-12
All-boys (Catholic)
304 S. Beach Blvd.
Bay St. Louis, MS 39520
(228) 467-9057
1854Year Founded
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Albert College Photo - We are Canada's oldest co-ed boarding and day school, established in 1857. Our Senior School is a beautiful historic building, built in 1923.
#21(T21–T22)Albert College
Gr: 7-12 | PK-12 (day)
160 Dundas Street West
Belleville, Canada K8P 1A6
(613) 968-5726
(14)
1857Year Founded
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Saint John's Preparatory School Photo - We are located on 2900 of woodlands and lakes in Collegeville, MN
#21(T21–T22)Saint John's Preparatory School
Gr: 8-12, PG | 6-12, PG (day)
Catholic
2280 Watertower Road
Collegeville, MN 56321
(320) 363-3315
1857Year Founded
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Cushing Academy Photo - Cushing Academy is located on a 162-acre campus in Ashburnham, Massachusetts
#23Cushing Academy
Gr: 9-12, PG
39 School Street
Ashburnham, MA 01430
(978) 827-7300
(3)
1865Year Founded
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The Webb School Photo
#24The Webb School
Gr: 7-12 | 6-12 (day)
319 Webb Road East
Bell Buckle, TN 37020
(931) 389-6003
(10)
1870Year Founded
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Stanstead College Photo
#25Stanstead College
Gr: 7-12, PG
450 Dufferein
Stanstead, Canada 05830
(819) 876-2223
(2)
1872Year Founded
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Perkiomen School Photo - Innovation Center
#26Perkiomen School
Gr: 6-12, PG
200 Seminary Street
Pennsburg, PA 18073
(215) 679-9511
(5)
1875Year Founded
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Miller School of Albemarle Photo - Miller School of Albemarle, a coeducational day and boarding college preparatory school for students in grades 8-12 and post-graduate, opened its doors in 1878 with 33 students. Girls first enrolled in 1884, making it one of the nation`s oldest coeducational boarding schools. The school is situated 12 miles west of Charlottesville on a gently rolling campus of 1600 pristine acres.
#27Miller School of Albemarle
Gr: 8-12, PG
1000 Samuel Miller Loop
Charlottesville, VA 22903
(434) 818-1385
1878Year Founded
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Holderness School Photo - In the Holderness classroom, each student is literally in the front row, with an average class size of 12. We offer AP courses spanning multiple disciplines and encourage students to pursue an intellectual passion of their own in their twelfth-grade year as part of the Senior Thesis program.
#28Holderness School
Gr: 9-12, PG
Episcopal
PO Box 1879
Plymouth, NH 03264
(603) 536-1747
(9)
1879Year Founded
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St. John's Northwestern Academy Photo - Students walking through campus.
#29St. John's Northwestern Academy
Gr: 7-12, PG
Episcopal
1101 Genesee Street
Delafield, WI 53018
(262) 646-7199
(4)
1884Year Founded
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The Cambridge School of Weston Photo - With over 200 courses to choose from, our dynamic curriculum allows students to balance engaging foundational courses with exploration and in-depth study as they choose from offerings like: "Multivariable Calculus," "The Biology of Cancer," "Wearable Art," "Japanese Women Writers," and "U.S. Cold War and Vietnam."
#30The Cambridge School of Weston
Gr: 9-12, PG
45 Georgian Road
Weston, MA 02493
(781) 642-8650
(17)
1886Year Founded
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The Kiski School Photo - Beginning in 2024, Kiski will offer co-education, extending our outstanding opportunities and unique educational environment to both boys and girls.
#31The Kiski School
Gr: 9-12, PG
1888 Brett Lane
Saltsburg, PA 15681
(724) 639-8035
1888Year Founded
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Hoosac School Photo - Hoosac School was founded in 1889.
#32(T32–T35)Hoosac School
Gr: 8-12, PG
Episcopal
14 Pine Valley Road
Hoosick, NY 12089
(518) 686-7331
1889Year Founded
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Missouri Military Academy Photo - Established in 1889, Missouri Military Academy has transformed young men into leaders who are well-educated, prepared gentlemen of character. Our long history and distinct traditions inspire a sense of pride and duty among the young men who seek to fulfill their potential at MMA.
#32(T32–T35)Missouri Military Academy
Gr: 7-12, PG
All-boys (Non-denom. / Christian)
204 Grand Street
Mexico, MO 65265
(573) 581-1776
(7)
1889Year Founded
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The Thacher School Photo - In courses designed for intellectual and creative expansion, students and teachers meet in seminar circles, studios, and laboratories to create a learning environment that is vigorous and supportive, galvanizing and nurturing.
#32(T32–T35)The Thacher School
Gr: 9-12
5025 Thacher Road
Ojai, CA 93023
(805) 640-3210
(26)
1889Year Founded
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Woodberry Forest School Photo
#32(T32–T35)Woodberry Forest School
Gr: 9-12
All-boys (Non-denom. / Christian)
241 Woodberry Station
Woodberry Forest, VA 22989
(888) 798-9371
(2)
1889Year Founded
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The MacDuffie School Photo - Aerial view of MacDuffie's 250 acre campus
#36(T36–T37)The MacDuffie School
Gr: 6-12, PG
66 School Street
Granby, MA 01033
(413) 255-0000
(1)
1890Year Founded
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Saint Bede Academy Photo - With an average student population of 300, our small class sizes offer students one-on-one interaction with their instructors.
#36(T36–T37)Saint Bede Academy
Gr: 9-12
Catholic
24 W US Highway 6
Peru, IL 61354
(815) 250-0285
1890Year Founded
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Camden Military Academy Photo - A proud family!
#38(T38–T39)Camden Military Academy
Gr: 7-12, PG
All-boys
520 Hwy. 1 North
Camden, SC 29020
(803) 432-6001
(21)
1892Year Founded
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Randolph-Macon Academy Photo
#38(T38–T39)Randolph-Macon Academy
Gr: 8-12, PG
United Methodist
200 Academy Drive
Front Royal, VA 22630
(540) 636-5484
(4)
1892Year Founded
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Walnut Hill School for the Arts Photo
#40Walnut Hill School for the Arts
Gr: 9-12, PG
12 Highland Street
Natick, MA 01760
(508) 650-5020
(3)
1893Year Founded
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Pomfret School Photo
#41Pomfret School
Gr: 9-12, PG
PO Box 128, 398 Pomfret Street
Pomfret, CT 06258
(860) 963-6120
(10)
1894Year Founded
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Fork Union Military Academy Photo - The cadets in parade formation. The first full dress parade of the year begins usually at the end of April and is on Sunday.
#42(T42–T43)Fork Union Military Academy
Gr: 7-12, PG
All-boys (Baptist)
PO Box 278, 4744 James Madison Hwy
Fork Union, VA 23055
(434) 842-4205
(7)
1898Year Founded
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Miss Hall's School Photo
#42(T42–T43)Miss Hall's School
Gr: 9-12, PG
All-girls
492 Holmes Road
Pittsfield, MA 01201
(413) 499-1300
(6)
1898Year Founded
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Asheville School Photo - Asheville School is for those who dare to be extraordinary. It is a privilege to learn and live at Asheville School, a small and special enclave among ancient mountains.
#44(T44–T46)Asheville School
Gr: 9-12
Non-denom. / Christian
360 Asheville School Rd.
Asheville, NC 28806
(828) 254-6345
(4)
1900Year Founded
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Christ School Photo
#44(T44–T46)Christ School
Gr: 8-12
All-boys (Episcopal)
500 Christ School Road
Asheville, NC 28704
(828) 684-6232
(1)
1900Year Founded
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Rumsey Hall School Photo
#44(T44–T46)Rumsey Hall School
Gr: 6-9 | PK-9 (day)
201 Romford Rd.
Washington, CT 06794
(860) 868-0535
1900Year Founded
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Salisbury School Photo
#47Salisbury School
Gr: 9-12, PG
All-boys
251 Canaan Road
Salisbury, CT 06068
(860) 435-5732
(2)
1901Year Founded
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The Madeira School Photo - Madeira's 376-acre campus in McLean, Virginia, overlooks the Potomac River from a perch just 12 miles northwest of Washington, D.C.
#48The Madeira School
Gr: 9-12, PG
All-girls
8328 Georgetown Pike
McLean, VA 22102
(703) 556-8273
(2)
1906Year Founded
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Riverside Military Academy Photo
#49(T49–T51)Riverside Military Academy
Gr: 6-12
All-boys
2001 Riverside Drive
Gainesville, GA 30501
(678) 696-2116
(5)
1907Year Founded
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San Marcos Academy Photo - San Marcos Academy has offered a tradition of excellence in private, Christian education since 1907.
#49(T49–T51)San Marcos Academy
Gr: 6-12 | Pre-K-12 (day)
Baptist
2801 Ranch Road 12
San Marcos, TX 78666
(800) 428-5120
1907Year Founded
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Trinity-Pawling School Photo - There are countless opportunities for students to develop leadership skills at Trinity-Pawling. Our community is intentionally designed to unleash the full potential of each student. Classes, clubs and activities, dorms, community service, and athletics are all venues for students to assume both official and unofficial positions of leadership, build their confidence, and become effective role models.
#49(T49–T51)Trinity-Pawling School
Gr: 8-12, PG | 7-12, PG (day)
All-boys (Episcopal)
700 Route 22
Pawling, NY 12564
(845) 855-4825
(1)
1907Year Founded
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Army and Navy Academy Photo - Our 16-acre campus is bordered by the Pacific Ocean in the northern San Diego coastal town of Carlsbad, CA. State-of-the-art athletic facilities support ANA's 17 different sports teams, plus surfing, beach volleyball, and ice hockey.
#52(T52–T53)Army and Navy Academy
Gr: 7-12
All-boys
2605 Carlsbad Blvd.
Carlsbad, CA 92008
(888) 762-2338
(5)
1910Year Founded
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Cate School Photo - Day Walk
#52(T52–T53)Cate School
Gr: 9-12
1960 Cate Mesa Road, P.O. Box 5005
Carpinteria, CA 93013
(805) 684-4127
(20)
1910Year Founded
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The Ethel Walker School Photo
#54(T54–T55)The Ethel Walker School
Gr: 7-12, PG
All-girls
230 Bushy Hill Road
Simsbury, CT 06070
(860) 408-4200
1911Year Founded
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Ojai Valley School Photo - OVS offers an exceptional college-prep program. Recent college acceptances for our students include Stanford, Columbia, Northeastern, NYU, Boston College, UC Berkeley, UCLA, Pitzer College, Smith College, Vassar College, Cal Poly San Luis Obispo, and many more.
#54(T54–T55)Ojai Valley School
Gr: 3-12 | PK-12 (day)
723 El Paseo Road
Ojai, CA 93023
(805) 646-1423
(2)
1911Year Founded
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Canterbury School Photo - At Canterbury School, a balanced educational experience integrates academic achievement, personal growth, and community engagement. As a welcoming interfaith community, Canterbury fosters a sense of belonging, providing passionate educators and transformative opportunities that guide you toward your fullest potential. This is what makes Canterbury School more than just a place to learn-it's a place to become your best self.
#56Canterbury School
Gr: 9-12, PG
Catholic
101 Aspetuck Avenue
New Milford, CT 06776
(860) 210-3832
(1)
1915Year Founded
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Hillcrest Lutheran Academy Photo - Hillcrest started in 1916 out of the Bible school movement in America at the turn of the century. For the past 100 years Hillcrest has served families from nearly every continent and throughout the United States with a comprehensive boarding school program that disciples students and equips them for their next stages in life.
#57Hillcrest Lutheran Academy
Gr: 10-12 | PK-12 (day)
Christian
610 Hillcrest Dr.
Fergus Falls, MN 56537
(218) 739-3371
(5)
1916Year Founded
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Athol Murray College of Notre Dame Photo - Notre Dame provides an exceptional educational and boarding experience with a balance of strong academic, athletic and spiritual growth in a safe and caring prairie environment. Notre Dame has 90% of its students in boarding from 20 different countries across the world. The Notre Dame Brand is renowned across the world for its hockey program and has 15 different competitive
#58(T58–T59)Athol Murray College of Notre Dame
Gr: 9-12
PO Box 100
Wilcox, Canada S0G5E0
(306) 732-1203
1920Year Founded
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Rectory School Photo - Being a member of a large, close-knit community lends itself to increased leadership skills, empathy, and understanding of one's self and those around them.
#58(T58–T59)Rectory School
Gr: 5-9 | K-9 (day)
P.O. Box 68 528 Pomfret Street
Pomfret, CT 06258
(860) 928-1328
(2)
1920Year Founded
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Christchurch School Photo - "Set your course at the river. " Established in the Episcopal tradition, Christchurch is inclusive, welcoming students and families of all faiths and backgrounds.
#60Christchurch School
Gr: 9-12
Episcopal
49 Seahorse Lane
Christchurch, VA 23031
(804) 542-6843
(1)
1921Year Founded
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Indian Mountain School Photo - Aerial View of IMS Upper Campus
#61(T61–T62)Indian Mountain School
Gr: 6-9 | PK-9 (day)
211 Indian Mountain Road
Lakeville, CT 06039
(435) 480-0871
1922Year Founded
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The Webb Schools Photo - Imagine learning from expert teachers, exploring paleontology in the Alf Museum, and heading to LA for concerts, sports, or museums-all while living near beaches, mountains, and desert. For more than 100 years, Webb has prepared and placed students at the nation's top colleges.
#61(T61–T62)The Webb Schools
Gr: 9-12
1175 West Baseline Road
Claremont, CA 91711
(909) 482-5214
(29)
1922Year Founded
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The Bement School Photo
#63The Bement School
Gr: 3-9 | K-9 (day)
94 Old Main Street, PO Box 8
Deerfield, MA 01342
(413) 774-4209
1925Year Founded
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Brooks School Photo - Come visit our beautiful 251 acre campus located on the shores of Lake Cochichewick.
#64(T64–T67)Brooks School
Gr: 9-12
Episcopal
1160 Great Pond Road
North Andover, MA 01845
(978) 725-6272
(10)
1926Year Founded
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Marianapolis Preparatory School Photo
#64(T64–T67)Marianapolis Preparatory School
Gr: 9-12, PG
Catholic
26 Chase Road
Thompson, CT
(860) 923-9565
(1)
1926Year Founded
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Portsmouth Abbey School Photo
#64(T64–T67)Portsmouth Abbey School
Gr: 9-12
Catholic
285 Cory's Lane
Portsmouth, RI 02871
(401) 643-1248
(5)
1926Year Founded
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The Winchendon School Photo
#64(T64–T67)The Winchendon School
Gr: 9-12, PG
172 Ash Street
Winchendon, MA 01475
(978) 297-4476
(2)
1926Year Founded
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St. Andrew's School, DE Photo - St. Andrew's seminar style discussions, which include faculty and students seated at a central round table, are heard throughout English, history and language classes.
#68St. Andrew's School, DE
Gr: 9-12
Episcopal
350 Noxontown Road
Middletown, DE 19709
(302) 285-4231
(13)
1929Year Founded
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Fountain Valley School of Colorado Photo - Fountain Valley School is a coed independent college preparatory school offering boarding and day programs for students grades 9-12. FVS was established in 1930 and is located on an 1,100-acre campus in Colorado Springs, Colo., approximately 70 miles (115 km) south of Denver. Colorado's mountain ski resorts are two hours to the west.
#69Fountain Valley School of Colorado
Gr: 9-12 | 8-12 (day)
6155 Fountain Valley School Road
Colorado Springs, CO 80911
(719) 391-5251
(5)
1930Year Founded
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The Putney School Photo - The Putney School is located on a working dairy farm. We value the dignity and relevance of physical work, which shows through our Work Program. Students carry out daily chores, collaborate in teams, learn skills, and sometimes lead crews various areas: Barn, Kitchen, Land-Use, Dining & Maintenance.
#70The Putney School
Gr: 9-12, PG
418 Houghton Brook Road
Putney, VT 05346
(802) 387-5566
(16)
1935Year Founded
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Cardigan Mountain School Photo
#71Cardigan Mountain School
Gr: 6-9
All-boys
62 Alumni Drive
Canaan, NH 03741
(603) 523-3548
(2)
1945Year Founded
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La Garenne Photo - Le Roc, the main building of La Garenne International School in Chesires-Villars, Switzerland
#72La Garenne
Gr: 1-12 | PK-12 (day)
Chemin des Chavasses 23
Chesières, Switzerland 1885
41244952453
1947Year Founded
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Hawaiʻi Preparatory Academy Photo
#73Hawaiʻi Preparatory Academy
Gr: 9-12, PG | K-12, PG (day)
65-1692 Kohala Mountain Road
Kamuela, HI 96743
(808) 881-4321
(8)
1949Year Founded
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Santa Catalina School Photo - Come visit our beautiful campus in Monterey, California! Call the admission office at 831.655.9356 or email admission@santacatalina.org to schedule your visit.
#74Santa Catalina School
Gr: 9-12
All-girls (Catholic)
1500 Mark Thomas Drive
Monterey, CA 93940
(831) 655-9356
(1)
1950Year Founded
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Applewild School Photo - The core values and core competencies we promote and the relationships we foster among all members of our diverse community prepare our students to be confident learners and engaged citizens.
#75(T75–T76)Applewild School
Gr: 4-9 | PK-9 (day)
120 Prospect Street
Fitchburg, MA 01420
(978) 342-6053
1957Year Founded
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Dunn School Photo - In 2020 the new Leadership Center was completed. Overlooking the open space known as Munger Common, the center provides state of the art meeting rooms and learning facilities, is home to the student-run Earwig Cafe, and hosts our college counseling team. Students can be found gathering both indoors and outside the center for conversation and relaxation.
#75(T75–T76)Dunn School
Gr: 9-12 | 6-12 (day)
P.O. Box 98, 2555 W. Highway 154
Los Olivos, CA 93441
(805) 686-0650
1957Year Founded
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Leysin American School in Switzerland (LAS) Photo
#77Leysin American School in Switzerland (LAS)
Gr: 7-12, PG
Chemin de la Source 3
Leysin, Switzerland 1854
0041244934872
1961Year Founded
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St. Stephen's School Photo - St. Stephen's is in a historical palazzo in the very heart of ancient Rome
#78St. Stephen's School
Gr: 9-12
Via Aventina 3
Rome, Italy 00153
39065750605
1964Year Founded
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Marine Military Academy Photo
#79Marine Military Academy
Gr: 7-12, PG
All-boys
320 Iwo Jima Blvd
Harlingen, TX 78550
(956) 423-6006
(1)
1965Year Founded
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The Calverton School Photo - Friendships are made across divisions at Calverton.
#80(T80–T81)The Calverton School
Gr: 8-12, PG | Pre-K-12, PG (day)
300 Calverton School Rd
Huntingtown, MD 20639
(410) 535-0216
1967Year Founded
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Eagle Hill School Photo - Eagle Hill School, located in the beautiful town of Hardwick, Massachusetts, is a traditional New England boarding school set on a 300-acre campus.
#80(T80–T81)Eagle Hill School
Gr: 8-12
242 Old Petersham Road
Hardwick, MA 01037
(413) 477-6000
(2)
1967Year Founded
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Mount Michael Benedictine School Photo
#82Mount Michael Benedictine School
Gr: 9-12
All-boys (Catholic)
22520 Mount Michael Road
Elkhorn, NE 68022
(402) 238-1457
1970Year Founded
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Delphian School Photo - Delphian is located just one hour from Portland, OR. on a large 720 acre wooded campus. The residential community is in constant motion, alive with students from all around the world.
#83(T83–T84)Delphian School
Gr: 5-12 | PK-12 (day)
20950 SW Rock Creek Road
Sheridan, OR 97378
(503) 843-3521
(28)
1976Year Founded
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TASIS England Photo - TASIS England's beautiful 46-acre campus near London and Heathrow airport is well positioned for access to travel and the cultural riches of this vibrant capital.
#83(T83–T84)TASIS England
Gr: 8-12 | PK-12 (day)
Coldharbour Lane
Thorpe, Surrey TW20 8TE, United Kingdom TW20 8TE
441932565252
1976Year Founded
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The International School of Minnesota (ISM) Photo - Aerial overview of ISM Campus! We have a 55-acre campus with a new boarding hall with space for 32 students.
#85The International School of Minnesota (ISM)
Gr: 8-12 | PK-12 (day)
6385 Beach Rd
Eden Prairie, MN 55344
(952) 918-1800
1985Year Founded
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Idyllwild Arts Academy Photo - Idyllwild Arts Academy is home to 280 students from over 30 countries and 27 US states, all devoted to intensive study of the arts. Named #1 High School for Arts in the nation by Niche in 2025.
#86Idyllwild Arts Academy
Gr: 9-12, PG
52500 Temecula Road
Idyllwild, CA 92549
(951) 659-2171
(23)
1986Year Founded
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Bronte College Photo - Bronte College Students
#87(T87–T88)Bronte College
Gr: 9-12
88 Bronte College Court
Mississauga, Ontario, Canada L5B1M9
(905) 270-7788
(6)
1991Year Founded
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Ross School Photo
#87(T87–T88)Ross School
Gr: 6-12, PG | PK-12, PG (day)
18 Goodfriend Drive
East Hampton, NY 11937
(631) 907-5400
1991Year Founded
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Riverstone International School Photo - Welcome to Riverstone International School! We look forward to welcoming you to our school in beautiful Boise, Idaho!
#89Riverstone International School
Gr: 8-12 | PK-12 (day)
5521 East Warm Springs Avenue
Boise, ID 83716
(208) 424-5000
1997Year Founded
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The International School of Schaffhausen Photo - The International School of Schaffhausen is located in the north of Switzerland, in the idyllic town of Schaffhausen. ISSH offers both the IB Diploma Programme and a High School Diploma Programme, with a focus on STEM subjects.
#90The International School of Schaffhausen
Gr: 9-12 | PK-12 (day)
Mühlentalstrasse 280
Schaffhausen, Switzerland 8200
41526241707
1999Year Founded
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EF Academy New York Photo - Our campus is located an hour outside of New York City in the peaceful suburban community of Thornwood, New York.
#91EF Academy New York
Gr: 9-12
582 Columbus Ave
Thornwood, NY 10594
(914) 495-6056
(2)
2005Year Founded
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SPIRE Academy Photo - SPIRE is set on 725 Acres and features 800,000 sq. ft of indoor, olympic caliber training and competition facilities including an indoor Olympic Certified Track, Olympic Pool and more.
#92SPIRE Academy
Gr: 9-12, PG
5201 SPIRE Circle
Geneva, OH 44041
(440) 466-1002
2009Year Founded
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CATS Academy Boston Photo - Adams Hall
#93CATS Academy Boston
Gr: 8-12, PG
2001 Washington Street
Braintree, MA 02184
(857) 400-9700
(1)
2012Year Founded
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The Global College Photo - The Global College Building
#94The Global College
Gr: 11-12
Calle Castellón de la Plana 8
Madrid, Spain 28006
0034915689937
2020Year Founded
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EF Academy Pasadena Photo - Hands-on learning encourages our students to make their own discoveries. Calculate velocity in the real world by measuring the speed of a baseball!
#95EF Academy Pasadena
Gr: 9-12
1505 E Howard St.
Pasadena, CA 91104
(626) 507-9223
2022Year Founded
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Frequently Asked Questions

Which boarding schools with 200-400 students have the oldest founding dates?
The boarding schools with 200-400 students with the oldest founding dates are Washington Academy, Cheshire Academy and Westtown School.
How many boarding schools with 200-400 students are ranked for the oldest founding dates?
95 boarding schools with 200-400 students are ranked for the oldest founding dates.

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Did You Know?

The "founding dates" below are the dates that schools have traditionally.
Note that the definition of "founding date" may differ slightly from school to school (e.g., whether it selects the year the school first received its charter or the year it first admitted students - regardless, the differences between the two are often small).

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