Boarding School Review - Established 2003
Hawaiʻi Preparatory Academy Photo
Hawaiʻi Preparatory Academy

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.
Endowment Range: $1M $190M Avg. Endowment: $38M

Largest Endowments

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

Sorted by range (alphabetically within range)
Boarding School
Endowment
Grades
Location
Rank: #1-31.-3
St. Andrew's School, DE
(Episcopal)
(13)
Endowment: $190 M
Grades: 9-12
350 Noxontown Road
Middletown, DE 19709
(302) 285-4231
Rank: #2-42.-4
The Thacher School
(26)
Endowment: $170 M
Grades: 9-12
5025 Thacher Road
Ojai, CA 93023
(805) 640-3210
Rank: #3-53.-5
St. Mark's School
St. Mark's School Photo - St. Mark's School
(Episcopal)
(7)
Endowment: $141 M
Grades: 9-12
25 Marlboro Road
Southborough, MA 01772
(508) 786-6118
Rank: #4-64.-6
Miss Porter's School
All-Girls
(5)
Endowment: $128 M
Grades: 9-12
60 Main Street
Farmington, CT 06032
(860) 409-3530
Rank: #5-75.-7
Emma Willard School
Emma Willard School Photo
All-Girls
(9)
Endowment: $103 M
Grades: 9-12, PG
285 Pawling Avenue
Troy, NY 12180
(518) 833-1320
Rank: #6-106.-10
Westtown School
(Quaker)
(44)
Endowment: $100 M
Grades: 9-12  | PK-12 (day)
975 Westtown Rd
West Chester, PA 19382
(610) 399-7900
Rank: #7-117.-11
Cate School
(19)
Endowment: $90 M
Grades: 9-12
1960 Cate Mesa Road, P.O. Box 5005
Carpinteria, CA 93013
(805) 684-4127
Rank: #8-128.-12
Brooks School
Brooks School Photo - Come visit our beautiful 251 acre campus located on the shores of Lake Cochichewick.
(Episcopal)
(10)
Endowment: $79 M
Grades: 9-12
1160 Great Pond Road
North Andover, MA 01845
(978) 725-6272
Rank: #9-149.-14
Kimball Union Academy
(5)
Endowment: $68 M
Grades: 9-12, PG
7 Campus Center Drive
Meriden, NH 03770
(603) 469-2100
Rank: #10-1510.-15
Salisbury School
All-Boys (Episcopalian)
(2)
Endowment: $65 M
Grades: 9-12, PG
251 Canaan Road
Salisbury, CT 06068
(860) 435-5732
Rank: #11-1611.-16
The Madeira School
The Madeira School Photo - Capitol Hill internships in the offices of senators and representatives are a hallmark of the junior year at Madeira
All-Girls
(2)
Endowment: $62 M
Grades: 9-12
8328 Georgetown Pike
McLean, VA 22102
(703) 556-8273
Rank: #12-1712.-17
Holderness School
(Episcopal)
(8)
Endowment: $60 M
Grades: 9-12, PG
PO Box 1879
Plymouth, NH 03264
(603) 536-1747
Rank: #13-1813.-18
Santa Catalina School
All-Girls (Catholic)
(1)
Endowment: $56 M
Grades: 9-12
1500 Mark Thomas Drive
Monterey, CA 93940
(831) 655-9356
Rank: #14-1914.-19
Trinity-Pawling School
All-Boys (Episcopal)
(1)
Endowment: $55 M
Grades: 8-12, PG  | 7-12, PG (day)
700 Route 22
Pawling, NY 12564
(845) 855-4825
Rank: #15-2015.-20
Hawai'i Preparatory Academy
Hawai'i Preparatory Academy Photo
(4)
Endowment: $51 M
Grades: 9-12, PG  | K-12, PG (day)
65-1692 Kohala Mountain Road
Kamuela, HI 96743
(808) 881-4321
Rank: #16-2116.-21
Cushing Academy
(2)
Endowment: $50 M
Grades: 9-12, PG
39 School Street
Ashburnham, MA 01430
(978) 827-7300
Rank: #17-2217.-22
Missouri Military Academy
All-Boys
(6)
Endowment: $49 M
Grades: 7-12, PG
204 Grand Street
Mexico, MO 65265
(573) 581-1776
Rank: #18-2518.-25
Asheville School
(nondenominational Christian heritage)
(4)
Endowment: $48 M
Grades: 9-12
360 Asheville School Rd.
Asheville, NC 28806
(828) 254-6345
Rank: #18-2518.-25
Pomfret School
(8)
Endowment: $48 M
Grades: 9-12, PG
PO Box 128, 398 Pomfret Street
Pomfret, CT 06258
(860) 963-6120
Rank: #18-2518.-25
Portsmouth Abbey School
(Catholic)
(5)
Endowment: $48 M
Grades: 9-12
285 Cory's Lane
Portsmouth, RI 02871
(401) 643-1248
Rank: #21-2721.-27
The Williston Northampton School
(17)
Endowment: $44 M
Grades: 9-12, PG  | 7-12, PG (day)
19 Payson Avenue
Easthampton, MA 01027
(413) 529-3241
Rank: #22-3022.-30
Fountain Valley School of Colorado
(4)
Endowment: $40 M
Grades: 9-12
6155 Fountain Valley School Road
Colorado Springs, CO 80911
(719) 391-5251
Rank: #22-3022.-30
Riverside Military Academy
All-Boys
(5)
Endowment: $40 M
Grades: 6-12
2001 Riverside Drive
Gainesville, GA 30501
(877) 692-2338
Rank: #24-3324.-33
New Hampton School
(8)
Endowment: $34 M
Grades: 9-12, PG
70 Main Street
New Hampton, NH 03256
(603) 677-3401
Rank: #24-3324.-33
Saint Mary's School
All-Girls (Episcopal)
(1)
Endowment: $34 M
Grades: 9-12
900 Hillsborough Street
Raleigh, NC 27603
(919) 424-4100
Rank: #26-3626.-36
Canterbury School
Canterbury School Photo - At Canterbury, you will develop the skills most essential to meeting future challenges and succeeding in college. These start with critical thinking, excellence in writing, and a solid foundation in digital literacy.
(Catholic heritage)
(1)
Endowment: $31 M
Grades: 9-12, PG
101 Aspetuck Avenue
New Milford, CT 06776
(860) 210-3832
Rank: #26-3626.-36
Proctor Academy
Proctor Academy Photo - A community built on authentic relationships.
(12)
Endowment: $31 M
Grades: 9-12, PG
204 Main Street - P.O. Box 500
Andover, NH 03216
(603) 735-6652
Rank: #26-3626.-36
Rumsey Hall School
Endowment: $31 M
Grades: 5-9  | PK-9 (day)
201 Romford Rd.
Washington, CT 06794
(860) 868-0535
Rank: #29-3929.-39
The Winchendon School
(2)
Endowment: $30 M
Grades: 9-12, PG
172 Ash Street
Winchendon, MA 01475
(978) 297-4476
Rank: #30-4030.-40
Cardigan Mountain School
All-Boys
(2)
Endowment: $29 M
Grades: 6-9
62 Alumni Drive
Canaan, NH 03741
(603) 523-3548
Rank: #31-4131.-41
Grier School
All-Girls
(6)
Endowment: $27 M
Grades: 7-12, PG  | 5-12, PG (day)
2522 Grier School Road
Tyrone, PA 16686
(814) 684-3000
Rank: #32-4432.-44
Bishop's College School
Endowment: $25 M
Grades: 7-12
80 chemin Moulton Hill
Sherbrooke, Quebec, Canada J1M 1Z8
(819) 566-0238
Rank: #32-4432.-44
Saint James School
(Episcopal)
Endowment: $25 M
Grades: 8-12
17641 College Road
Hagerstown, MD 21740
(301) 733-9330
Rank: #34-4734.-47
The Ethel Walker School
All-Girls
Endowment: $24 M
Grades: 7-12, PG  | 6-12, PG (day)
230 Bushy Hill Road
Simsbury, CT 06070
(860) 408-4200
Rank: #34-4734.-47
Kents Hill School
(1)
Endowment: $24 M
Grades: 9-12, PG
PO Box 257, 1614 Main St., Rte. 17
Kents Hill, ME 04349
(207) 685-1606
Rank: #34-4734.-47
The Putney School
(14)
Endowment: $24 M
Grades: 9-12, PG
418 Houghton Brook Road
Putney, VT 05346
(802) 387-6201
Rank: #37-5337.-53
Gould Academy
(2)
Endowment: $20 M
Grades: 8-12, PG  | 7-12, PG (day)
39 Church Street
Bethel, ME 04217
(207) 824-7777
Rank: #37-5337.-53
Miller School of Albemarle
Endowment: $20 M
Grades: 8-12, PG
1000 Samuel Miller Loop
Charlottesville, VA 22903
(434) 818-1385
Rank: #37-5337.-53
Rectory School
(2)
Endowment: $20 M
Grades: 5-9  | PK-9 (day)
P.O. Box 68 528 Pomfret Street
Pomfret, CT 06258
(860) 928-1328
Rank: #37-5337.-53
St. Andrew's-Sewanee School
(Episcopal)
(6)
Endowment: $20 M
Grades: 7-12  | 6-12 (day)
290 Quintard Rd.
Sewanee, TN 37375
(931) 598-5651
Rank: #37-5337.-53
Stanstead College
(2)
Endowment: $20 M
Grades: 7-12, PG
450 Dufferein
Stanstead, Canada 05830
(819) 876-2223
Rank: #42-5542.-55
Christ School
Christ School Photo
All-Boys (Episcopal Church)
(1)
Endowment: $18 M
Grades: 8-12
500 Christ School Road
Asheville, NC 28704
(828) 684-6232
Rank: #42-5542.-55
Fork Union Military Academy
All-Boys (Baptist General Association of Virginia)
(6)
Endowment: $18 M
Grades: 7-12, PG
PO Box 278, 4744 James Madison Hwy
Fork Union, VA 23055
(434) 842-4205
Rank: #44-5844.-58
Cheshire Academy
(5)
Endowment: $16 M
Grades: 9-12, PG
10 Main Street
Cheshire, CT 06410
(203) 439-7250
Rank: #44-5844.-58
Tilton School
(1)
Endowment: $16 M
Grades: 9-12, PG
30 School Street
Tilton, NH 03276
(603) 286-1733
Rank: #44-5844.-58
Walnut Hill School for the Arts
(3)
Endowment: $16 M
Grades: 9-12, PG
12 Highland Street
Natick, MA 01760
(508) 650-5020
Rank: #47-6147.-61
Brewster Academy
(10)
Endowment: $15 M
Grades: 9-12, PG
80 Academy Drive
Wolfeboro, NH 03894
(603) 569-7200
Rank: #47-6147.-61
Perkiomen School
(Independent)
(5)
Endowment: $15 M
Grades: 6-12, PG
200 Seminary Street
Pennsburg, PA 18073
(215) 679-9511
Rank: #49-6249.-62
The Cambridge School of Weston
The Cambridge School of Weston Photo - With over 250 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."
(15)
Endowment: $14 M
Grades: 9-12, PG
45 Georgian Road
Weston, MA 02493
(781) 642-8650
Rank: #50-6350.-63
Dunn School
Endowment: $13 M
Grades: 9-12  | 6-12 (day)
P.O. Box 98, 2555 W. Highway 154
Los Olivos, CA 93441
(800) 287-9197
Rank: #51-6851.-68
Indian Mountain School
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.
Endowment: $10 M
Grades: 5-9  | PK-9 (day)
211 Indian Mountain Road
Lakeville, CT 06039
(435) 480-0871
Rank: #51-6851.-68
Randolph-Macon Academy
(United Methodist-affiliated)
(4)
Endowment: $10 M
Grades: 6-12, PG
200 Academy Drive
Front Royal, VA 22630
(540) 636-5484
Rank: #53-7053.-70
Eagle Hill School
(2)
Endowment: $8 M
Grades: 8-12
P.O. Box 116 , 242 Old Petersham Road
Hardwick, MA 01037
(413) 477-6000
Rank: #53-7053.-70
Forman School
(6)
Endowment: $8 M
Grades: 9-12, PG
12 Norfolk Road, P.O. Box 80
Litchfield, CT 06759
(860) 567-1802
Rank: #55-7655.-76
Christchurch School
(Episcopal)
Endowment: $6 M
Grades: 9-12
49 Seahorse Lane
Christchurch, VA 23031
(804) 542-6843
Rank: #55-7655.-76
Idyllwild Arts Academy
(18)
Endowment: $6 M
Grades: 9-12, PG
52500 Temecula Road
Idyllwild, CA 92549
(951) 468-7223
Rank: #55-7655.-76
San Marcos Academy
(Affiliated with Texas Baptists through the Baptist General Convention of Texas.)
Endowment: $6 M
Grades: 6-12  | Pre-K-12 (day)
2801 Ranch Road 12
San Marcos, TX 78666
(800) 428-5120
Rank: #55-7655.-76
Solebury School
Solebury School Photo - Solebury School's Math and Science (STEM) program offers students opportunities to pursue AP and Honors classes, as well as Engineering courses that will prepare them for college.
(4)
Endowment: $6 M
Grades: 9-12, PG
6832 Phillips Mill Road
New Hope, PA 18938
(215) 862-5261
Rank: #59-8559.-85
Mount Michael Benedictine School
Mount Michael Benedictine School Photo
All-Boys (Catholic)
Endowment: <$5 M
Grades: 9-12
22520 Mount Michael Road
Elkhorn, NE 68022
(402) 238-1457
Rank: #59-8559.-85
Washington Academy
Endowment: <$5 M
Grades: 9-12, PG
PO Box 190, 66 Cutler Road
East Machias, ME 04630
(207) 255-8301
Rank: #59-8559.-85
Maur Hill - Mount Academy (MH-MA)
(Catholic)
Endowment: <$5 M
Grades: 9-12
1000 Green St.
Atchison, KS 66002
(913) 367-5482
Rank: #59-8559.-85
Delphian School
(non-religious)
(19)
Endowment: <$5 M
Grades: 5-12  | PK-12 (day)
20950 SW Rock Creek Road
Sheridan, OR 97378
(503) 843-3521
Rank: #59-8559.-85
Ojai Valley School
(2)
Endowment: <$5 M
Grades: 3-12  | PK-12 (day)
723 El Paseo Road
Ojai, CA 93023
(805) 646-1423
Rank: #59-8559.-85
Hoosac School
(Episcopal)
(1)
Endowment: <$5 M
Grades: 8-12, PG
14 Pine Valley Road
Hoosick, NY 12089
(518) 686-7331
Rank: #59-8559.-85
The MacDuffie School
(1)
Endowment: <$5 M
Grades: 6-12, PG
66 School Street
Granby, MA 01033
(413) 255-0000

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