Highest Average ACT Scores

Among "Schools with 200-400 Students", view the boarding schools with the highest average ACT scores (2026).
For several key reasons (listed below), these comparisons are intended only as informal reference points for evaluating the ACT taking ability of a school's student body.
A school's average ACT score is based on a relatively small sample of students from year to year (typically less than 100 students for a graduating class).
Average ACT scores, then, can naturally fluctuate year to year while the quality of the overall program and strength of the student body remains consistent.
Schools in the list below are often separated by small statistical differences, which for all intents and purposes, are not meaningful in determining the overall strength of the student body between two schools.
As a final note: average ACT scores should never be used by a family as an expectation of what score they can expect their child to receive if they go to a particular institution.
Cate School
Delphian School
The Winchendon School
Grier School
Hoosac School
The International School of Minnesota (ISM)
The MacDuffie School
Mount Michael Benedictine School
St. Andrew's School, DE
Santa Catalina School
The Williston Northampton School
Asheville School
Emma Willard School
The Ethel Walker School
Fountain Valley School of Colorado
Kimball Union Academy
Maur Hill - Mount Academy (MH-MA)
Miss Porter's School
Saint James School
Trinity-Pawling School
Average ACT Score
(Out of 36) Range:
20
31 Avg. Average ACT Score
(Out of 36):
26

Highest Average ACT Scores

Among Schools with 200-400 Students (out of 38 schools)

Sorted by range (alphabetically within range)
Cate School Photo - Day Walk
#1(T1–T5)Cate School
Gr: 9-12
1960 Cate Mesa Road, P.O. Box 5005
Carpinteria, CA 93013
(805) 684-4127
(19)
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.
#1(T1–T5)Delphian School
Gr: 5-12 | PK-12 (day)
non-religious
20950 SW Rock Creek Road
Sheridan, OR 97378
(503) 843-3521
(19)
The Winchendon School Photo
Gr: 9-12, PG
172 Ash Street
Winchendon, MA 01475
(978) 297-4476
(2)
Grier School Photo
#4(T4–T17)Grier School
Gr: 7-12, PG | 5-12, PG (day)
All-girls
2522 Grier School Road
Tyrone, PA 16686
(814) 684-3000
(6)
Hoosac School Photo - Hoosac School was founded in 1889.
#4(T4–T17)Hoosac School
Gr: 8-12, PG
Episcopal
14 Pine Valley Road
Hoosick, NY 12089
(518) 686-7331
(1)
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.
Gr: 8-12 | Pre-K-12 (day)
6385 Beach Rd
Eden Prairie, MN 55344
(952) 918-1800
The MacDuffie School Photo - Aerial view of MacDuffie's 250 acre campus
Gr: 6-12, PG
66 School Street
Granby, MA 01033
(413) 255-0000
(1)
Mount Michael Benedictine School Photo
Gr: 9-12
All-boys (Catholic)
22520 Mount Michael Road
Elkhorn, NE 68022
(402) 238-1457
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)
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.
Gr: 9-12
All-girls (Catholic)
1500 Mark Thomas Drive
Monterey, CA 93940
(831) 655-9356
(1)
The Williston Northampton School Photo - Williston promises an academic culture that respects your ability to think for yourself and gives you the right balance of structure and freedom to make the most of it. You'll be immersed in a challenging curriculum that cultivates active, lifelong learning. And with an average class size of 13 students, your teachers are truly going to know you.
Gr: 9-12, PG | 7-12, PG (day)
19 Payson Avenue
Easthampton, MA 01027
(413) 529-3241
(17)
Asheville School Photo - Asheville School. An Education for an Inspired Life.
#12(T12–T32)Asheville School
Gr: 9-12
nondenominational Christian heritage
360 Asheville School Rd.
Asheville, NC 28806
(828) 254-6345
(4)
Emma Willard School Photo
#12(T12–T32)Emma Willard School
Gr: 9-12, PG
All-girls
285 Pawling Avenue
Troy, NY 12180
(518) 833-1320
(9)
The Ethel Walker School Photo - Beaver Brook Building - This building houses many of our academic classes as well as administrative offices, meeting spaces, art rooms, and our computer lab.
Gr: 7-12, PG | 6-12, PG (day)
All-girls
230 Bushy Hill Road
Simsbury, CT 06070
(860) 408-4200
Fountain Valley School of Colorado Photo - Fountain Valley School is a coed independent college preparatory school that offers day and boarding programs for students in grades 9-12. FVS was established in 1930 and is located on an 1,100 acre campus in Colorado Springs, Colo., which is 70 miles (115 km) south of Denver. Colorado's mountain ski resorts are two hours to the west, and the School
Gr: 9-12
6155 Fountain Valley School Road
Colorado Springs, CO 80911
(719) 391-5251
(4)
Kimball Union Academy Photo
#12(T12–T32)Kimball Union Academy
Gr: 9-12, PG
7 Campus Center Drive
Meriden, NH 03770
(603) 469-2100
(5)
Maur Hill - Mount Academy (MH-MA) Photo
Gr: 9-12
Catholic
1000 Green St.
Atchison, KS 66002
(913) 367-5482
Miss Porter's School Photo
#12(T12–T32)Miss Porter's School
Gr: 9-12
All-girls
60 Main Street
Farmington, CT 06032
(860) 409-3530
(5)
Saint James School Photo - Saint James' picturesque 800-acre campus is conveniently located only 70 miles from the Baltimore-Washington metropolitan area.
#12(T12–T32)Saint James School
Gr: 8-12
Episcopal
17641 College Road
Hagerstown, MD 21740
(301) 733-9330
Trinity-Pawling School Photo - The next-generation school for boys is here, on a campus that feels warm and welcoming and human-scaled, in an academic community that thinks ahead, looks forward, and gets transformational results.
Gr: 8-12, PG | 7-12, PG (day)
All-boys (Episcopal)
700 Route 22
Pawling, NY 12564
(845) 855-4825
(1)
Camden Military Academy Photo - A proud family!
Gr: 7-12, PG
All-boys (non-sectarian)
520 Hwy. 1 North
Camden, SC 29020
(803) 432-6001
(18)
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.
#21(T21–T43)Canterbury School
Gr: 9-12, PG
Catholic heritage
101 Aspetuck Avenue
New Milford, CT 06776
(860) 210-3832
(1)
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.
#21(T21–T43)Cheshire Academy
Gr: 9-12, PG
10 Main Street
Cheshire, CT 06410
(203) 439-7250
(5)
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.
#21(T21–T43)Dunn School
Gr: 9-12 | 6-12 (day)
P.O. Box 98, 2555 W. Highway 154
Los Olivos, CA 93441
(800) 287-9197
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.
#21(T21–T43)Holderness School
Gr: 9-12, PG
Episcopal
PO Box 1879
Plymouth, NH 03264
(603) 536-1747
(8)
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
Proctor Academy Photo - A community built on authentic relationships.
#21(T21–T43)Proctor Academy
Gr: 9-12, PG
204 Main Street - P.O. Box 500
Andover, NH 03216
(603) 735-6652
(12)
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)
Saint Bede Academy Photo - With an average student population of 300, our small class sizes offer students one-on-one interaction with their instructors.
#21(T21–T43)Saint Bede Academy
Gr: 9-12
Catholic
24 W US Highway 6
Peru, IL 61354
(815) 250-0285
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.
Gr: 7-12
All-boys (Catholic)
304 S. Beach Blvd.
Bay St. Louis, MS 39520
(228) 467-9057
Eagle Hill School Photo - The PJM STEM center houses science and math classrooms, labs, and makerspaces. Anything that can be imagined can be created in the PJM STEM center!
#31(T31–T52)Eagle Hill School
Gr: 8-12
P.O. Box 116 , 242 Old Petersham Road
Hardwick, MA 01037
(413) 477-6000
(2)
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)
Idyllwild, CA
Gr: 9-12, PG
52500 Temecula Road
Idyllwild, CA 92549
(951) 468-7223
(18)
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)
Riverside Military Academy Photo
Gr: 6-12
All-boys
2001 Riverside Drive
Gainesville, GA 30501
(877) 692-2338
(5)
Ross School Photo
#31(T31–T52)Ross School
Gr: 6-12, PG | PK-12, PG (day)
18 Goodfriend Drive
East Hampton, NY 11937
(631) 907-5400
San Marcos Academy Photo - San Marcos Academy has offered a tradition of excellence in private, Christian education since 1907.
#31(T31–T52)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
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.
#31(T31–T52)Tilton School
Gr: 9-12, PG
30 School Street
Tilton, NH 03276
(603) 286-1733
(1)

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