Largest Endowments

Among "Schools with 200-400 Students", view the boarding schools with the largest endowments (2026).
Boarding schools that have larger students bodies or older histories are more likely to have larger endowments than other schools (since they have had more alumni over the years to donate funds).
Schools with lower endowments still often have excellent facilities and resources for students, but simply have not yet had the time or alumni base to build up endowments equivalent to older, larger schools.
Endowment per student is another metric for comparing endowments between schools of different size.
Smaller schools can often have a larger endowment per student figure than larger schools.
St. Andrew's School, DE
The Thacher School
St. Mark's School
Miss Porter's School
Emma Willard School
Westtown School
Cate School
Brooks School
Kimball Union Academy
Salisbury School
The Madeira School
Holderness School
Santa Catalina School
Trinity-Pawling School
Hawaiʻi Preparatory Academy
Cushing Academy
Missouri Military Academy
Asheville School
Pomfret School
Portsmouth Abbey School
Endowment Range: $1M $190M Avg. Endowment: $38M

Quick Facts (2026)

  • # Boarding Schools: 65

Largest Endowments

Among Schools with 200-400 Students (out of 65 schools)

Sorted by range (alphabetically within range)
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.
Gr: 9-12
Episcopal
350 Noxontown Road
Middletown, DE 19709
(302) 285-4231
(13)
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.
Gr: 9-12
5025 Thacher Road
Ojai, CA 93023
(805) 640-3210
(26)
St. Mark's School Photo - St. Mark's School
Gr: 9-12
Episcopal
25 Marlboro Road
Southborough, MA 01772
(508) 786-6118
(7)
Miss Porter's School Photo
Gr: 9-12
All-girls
60 Main Street
Farmington, CT 06032
(860) 409-3530
(5)
Emma Willard School Photo
Gr: 9-12, PG
All-girls
285 Pawling Avenue
Troy, NY 12180
(518) 833-1320
(9)
Westtown School Photo - Main building
#6(T6–T10)Westtown School
Gr: 9-12 | PK-12 (day)
Quaker
975 Westtown Rd
West Chester, PA 19382
(610) 399-7900
(44)
Cate School Photo - Day Walk
#7(T7–T11)Cate School
Gr: 9-12
1960 Cate Mesa Road, P.O. Box 5005
Carpinteria, CA 93013
(805) 684-4127
(19)
Brooks School Photo - Come visit our beautiful 251 acre campus located on the shores of Lake Cochichewick.
#8(T8–T12)Brooks School
Gr: 9-12
Episcopal
1160 Great Pond Road
North Andover, MA 01845
(978) 725-6272
(10)
Kimball Union Academy Photo
Gr: 9-12, PG
7 Campus Center Drive
Meriden, NH 03770
(603) 469-2100
(5)
Salisbury School Photo
#10(T10–T15)Salisbury School
Gr: 9-12, PG
All-boys (Episcopalian)
251 Canaan Road
Salisbury, CT 06068
(860) 435-5732
(2)
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.
#11(T11–T16)The Madeira School
Gr: 9-12
All-girls
8328 Georgetown Pike
McLean, VA 22102
(703) 556-8273
(2)
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.
#12(T12–T17)Holderness School
Gr: 9-12, PG
Episcopal
PO Box 1879
Plymouth, NH 03264
(603) 536-1747
(8)
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.
#13(T13–T18)Santa Catalina School
Gr: 9-12
All-girls (Catholic)
1500 Mark Thomas Drive
Monterey, CA 93940
(831) 655-9356
(1)
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.
Gr: 8-12, PG | 7-12, PG (day)
All-boys (Episcopal)
700 Route 22
Pawling, NY 12564
(845) 855-4825
(1)
Hawai'i Preparatory Academy Photo
Gr: 9-12, PG | K-12, PG (day)
65-1692 Kohala Mountain Road
Kamuela, HI 96743
(808) 881-4321
(4)
Cushing Academy Photo - Cushing Academy is located on a 162-acre campus in Ashburnham, Massachusetts
#16(T16–T21)Cushing Academy
Gr: 9-12, PG
39 School Street
Ashburnham, MA 01430
(978) 827-7300
(2)
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.
Gr: 7-12, PG
All-boys (Non-denom. / Christian)
204 Grand Street
Mexico, MO 65265
(573) 581-1776
(6)
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.
#18(T18–T25)Asheville School
Gr: 9-12
nondenominational Christian heritage
360 Asheville School Rd.
Asheville, NC 28806
(828) 254-6345
(4)
Pomfret School Photo
#18(T18–T25)Pomfret School
Gr: 9-12, PG
PO Box 128, 398 Pomfret Street
Pomfret, CT 06258
(860) 963-6120
(8)
Portsmouth Abbey School Photo
Gr: 9-12
Catholic
285 Cory's Lane
Portsmouth, RI 02871
(401) 643-1248
(5)
The Williston Northampton School Photo - Williston has 10 dorms, five for girls and five for boys. Freshmen live in separate ninth grade dorms but all other dorms are mixed grades. Outside of the dorms, students can enjoy fires around our campus fire pits, play spikeball on one of our myriad setups, and enjoy the beauty of Western Massachusetts in an Adirondack chair.
Gr: 9-12, PG | 7-12, PG (day)
19 Payson Avenue
Easthampton, MA 01027
(413) 529-3241
(17)
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.
Gr: 9-12
6155 Fountain Valley School Road
Colorado Springs, CO 80911
(719) 391-5251
(4)
Riverside Military Academy Photo
Gr: 6-12
All-boys
2001 Riverside Drive
Gainesville, GA 30501
(877) 692-2338
(5)
New Hampton School Photo - Beautiful, 340-acre campus
#24(T24–T33)New Hampton School
Gr: 9-12, PG
70 Main Street
New Hampton, NH 03256
(603) 677-3401
(8)
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!
#24(T24–T33)Saint Mary's School
Gr: 9-12
All-girls (Episcopal)
900 Hillsborough Street
Raleigh, NC 27603
(919) 424-4100
(1)
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.
#26(T26–T36)Canterbury School
Gr: 9-12, PG
Catholic heritage
101 Aspetuck Avenue
New Milford, CT 06776
(860) 210-3832
(1)
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.
#26(T26–T36)Proctor Academy
Gr: 9-12, PG
204 Main Street - P.O. Box 500
Andover, NH 03216
(603) 735-6652
(12)
Rumsey Hall School Photo - Rumsey Hall School campus.
#26(T26–T36)Rumsey Hall School
Gr: 5-9 | PK-9 (day)
201 Romford Rd.
Washington, CT 06794
(860) 868-0535
The Winchendon School Photo
#29(T29–T39)The Winchendon School
Gr: 9-12, PG
172 Ash Street
Winchendon, MA 01475
(978) 297-4476
(2)
Cardigan Mountain School Photo
Gr: 6-9
All-boys
62 Alumni Drive
Canaan, NH 03741
(603) 523-3548
(2)
Grier School Photo
#31(T31–T41)Grier School
Gr: 7-12, PG | 5-12, PG (day)
All-girls
2522 Grier School Road
Tyrone, PA 16686
(814) 684-3000
(6)
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
Gr: 7-12
80 chemin Moulton Hill
Sherbrooke, Quebec, Canada J1M 1Z8
(819) 566-0238
Saint James School Photo - Saint James' picturesque 800-acre campus is conveniently located only 70 miles from the Baltimore-Washington metropolitan area.
#32(T32–T44)Saint James School
Gr: 8-12
Episcopal
17641 College Road
Hagerstown, MD 21740
(301) 733-9330
The Ethel Walker School Photo
Gr: 7-12, PG | 6-12, PG (day)
All-girls
230 Bushy Hill Road
Simsbury, CT 06070
(860) 408-4200
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.
#34(T34–T47)Kents Hill School
Gr: 9-12, PG
PO Box 257, 1614 Main St., Rte. 17
Kents Hill, ME 04349
(207) 685-1606
(1)
The Putney School Photo
#34(T34–T47)The Putney School
Gr: 9-12, PG
418 Houghton Brook Road
Putney, VT 05346
(802) 387-6201
(14)
Gould Academy Photo - Rock climbing, hiking, ice climbing canoeing and variety of other outdoor experiences abound in the White Mountains.
#37(T37–T53)Gould Academy
Gr: 8-12, PG | 7-12, PG (day)
39 Church Street
Bethel, ME 04217
(207) 824-7777
(2)
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.
Gr: 8-12, PG
1000 Samuel Miller Loop
Charlottesville, VA 22903
(434) 818-1385
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.
#37(T37–T53)Rectory School
Gr: 5-9 | PK-9 (day)
P.O. Box 68 528 Pomfret Street
Pomfret, CT 06258
(860) 928-1328
(2)
St. Andrew's-Sewanee School Photo - Founded in 1868, St. Andrew's-Sewanee and its students enjoy many long held traditions like the Morning Watch, ringing the Chapel Bells after a victory, Creative Expression Assemblies, Winterim, and the International Flag Ceremony. Recent additions include the Tri-Tree Competition, the pancake race, and the Blessing of the Animals.
Gr: 7-12 | 6-12 (day)
Episcopal
290 Quintard Rd.
Sewanee, TN 37375
(931) 598-5651
(6)
Stanstead College Photo
#37(T37–T53)Stanstead College
Gr: 7-12, PG
450 Dufferein
Stanstead, Canada 05830
(819) 876-2223
(2)
Christ School Photo
#42(T42–T55)Christ School
Gr: 8-12
All-boys (Episcopal Church)
500 Christ School Road
Asheville, NC 28704
(828) 684-6232
(1)
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.
Gr: 7-12, PG
All-boys (Baptist General Association of Virginia)
PO Box 278, 4744 James Madison Hwy
Fork Union, VA 23055
(434) 842-4205
(6)
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.
#44(T44–T58)Cheshire Academy
Gr: 9-12, PG
10 Main Street
Cheshire, CT 06410
(203) 439-7250
(5)
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.
#44(T44–T58)Tilton School
Gr: 9-12, PG
30 School Street
Tilton, NH 03276
(603) 286-1733
(1)
Walnut Hill School for the Arts Photo
Gr: 9-12, PG
12 Highland Street
Natick, MA 01760
(508) 650-5020
(3)
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.
#47(T47–T61)Brewster Academy
Gr: 9-12, PG
80 Academy Drive
Wolfeboro, NH 03894
(603) 569-7200
(10)
Perkiomen School Photo - Innovation Center
#47(T47–T61)Perkiomen School
Gr: 6-12, PG
Independent
200 Seminary Street
Pennsburg, PA 18073
(215) 679-9511
(5)
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."
Gr: 9-12, PG
45 Georgian Road
Weston, MA 02493
(781) 642-8650
(15)
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.
#50(T50–T63)Dunn School
Gr: 9-12 | 6-12 (day)
P.O. Box 98, 2555 W. Highway 154
Los Olivos, CA 93441
(800) 287-9197
Indian Mountain School Photo - As one of the most popular spring sports at IMS, the varsity boys and girls programs have sent athletes to compete at the highest levels of high school and college.
Gr: 5-9 | PK-9 (day)
211 Indian Mountain Road
Lakeville, CT 06039
(435) 480-0871
Randolph-Macon Academy Photo
Gr: 6-12, PG
United Methodist-affiliated
200 Academy Drive
Front Royal, VA 22630
(540) 636-5484
(4)
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.
#53(T53–T70)Eagle Hill School
Gr: 8-12
P.O. Box 116 , 242 Old Petersham Road
Hardwick, MA 01037
(413) 477-6000
(2)
Forman School Photo - The Forman Green is at the center of campus life. Surrounded by dorms and faculty homes, it reflects the traditional charm of an historic New England community.
#53(T53–T70)Forman School
Gr: 9-12, PG
12 Norfolk Road, P.O. Box 80
Litchfield, CT 06759
(860) 567-1802
(6)
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.
#55(T55–T76)Christchurch School
Gr: 9-12
Episcopal
49 Seahorse Lane
Christchurch, VA 23031
(804) 542-6843
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.
Gr: 9-12, PG
52500 Temecula Road
Idyllwild, CA 92549
(951) 468-7223
(18)
San Marcos Academy Photo - San Marcos Academy has offered a tradition of excellence in private, Christian education since 1907.
#55(T55–T76)San Marcos Academy
Gr: 6-12 | Pre-K-12 (day)
Affiliated with Texas Baptists through the Baptist General Convention of Texas.
2801 Ranch Road 12
San Marcos, TX 78666
(800) 428-5120
Solebury School Photo
#55(T55–T76)Solebury School
Gr: 9-12, PG
6832 Phillips Mill Road
New Hope, PA 18938
(215) 862-5261
(4)
Mount Michael Benedictine School Photo
Gr: 9-12
All-boys (Catholic)
22520 Mount Michael Road
Elkhorn, NE 68022
(402) 238-1457
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.
#59(T59–T85)Washington Academy
Gr: 9-12, PG
PO Box 190, 66 Cutler Road
East Machias, ME 04630
(207) 255-8301
Maur Hill - Mount Academy (MH-MA) Photo
Gr: 9-12
Catholic
1000 Green St.
Atchison, KS 66002
(913) 367-5482
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.
#59(T59–T85)Delphian School
Gr: 5-12 | PK-12 (day)
non-religious
20950 SW Rock Creek Road
Sheridan, OR 97378
(503) 843-3521
(19)
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.
#59(T59–T85)Ojai Valley School
Gr: 3-12 | PK-12 (day)
723 El Paseo Road
Ojai, CA 93023
(805) 646-1423
(2)
Hoosac School Photo - Hoosac School was founded in 1889.
#59(T59–T85)Hoosac School
Gr: 8-12, PG
Episcopal
14 Pine Valley Road
Hoosick, NY 12089
(518) 686-7331
(1)
The MacDuffie School Photo - Aerial view of MacDuffie's 250 acre campus
#59(T59–T85)The MacDuffie School
Gr: 6-12, PG
66 School Street
Granby, MA 01033
(413) 255-0000
(1)

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