The MacDuffie School Photo - Aerial view of MacDuffie's 250 acre campus

Highest Average ACT Scores

Among "Schools with 200-400 Students", view the boarding schools with the highest average ACT scores (2024-25).
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.
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 41 schools)

Sorted by range (alphabetically within range)
Boarding School
Average ACT Score
(Out of 36)
Grades
Location
Rank: #1-61.-6
Cate School
Cate School Photo - Day Walk
(19)
Average ACT Score
(Out of 36):
30-32
Grades: 9-12
1960 Cate Mesa Road, P.O. Box 5005
Carpinteria, CA 93013
(805) 684-4127
Rank: #1-61.-6
Cushing Academy
Cushing Academy Photo - Main Building
(3)
Average ACT Score
(Out of 36):
30-32
Grades: 9-12, PG
39 School Street
Ashburnham, MA 01430
(978) 827-7300
Rank: #1-61.-6
Delphian School
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.
(26)
Average ACT Score
(Out of 36):
30-32
Grades: 5-12  | PK-12 (day)
20950 SW Rock Creek Road
Sheridan, OR 97378
(503) 843-3521
Rank: #1-61.-6
Miss Porter's School
Miss Porter's School Photo
All-Girls
(5)
Average ACT Score
(Out of 36):
30-32
Grades: 9-12
60 Main Street
Farmington, CT 06032
(860) 409-3530
Rank: #1-61.-6
The Thacher School
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.
(26)
Average ACT Score
(Out of 36):
30-32
Grades: 9-12
5025 Thacher Road
Ojai, CA 93023
(805) 640-3210
Rank: #1-61.-6
The Winchendon School
The Winchendon School Photo
(2)
Average ACT Score
(Out of 36):
30-32
Grades: 9-12, PG
172 Ash Street
Winchendon, MA 01475
(978) 297-4476
Rank: #7-167.-16
Average ACT Score
(Out of 36):
28-30
Grades: 9-12, PG
45 Georgian Road
Weston, MA 02493
(781) 642-8650
Rank: #7-167.-16
Grier School
Grier School Photo
All-Girls
(6)
Average ACT Score
(Out of 36):
28-30
Grades: 7-12, PG  | 5-12, PG (day)
2522 Grier School Road
Tyrone, PA 16686
(814) 684-3000
Rank: #7-167.-16
Hoosac School
Hoosac School Photo - Hoosac School was founded in 1889.
(Episcopal)
Average ACT Score
(Out of 36):
28-30
Grades: 8-12, PG
14 Pine Valley Road
Hoosick, NY 12089
(518) 686-7331
Rank: #7-167.-16
Average ACT Score
(Out of 36):
28-30
Grades: 8-12  | Pre-K-12 (day)
6385 Beach Rd
Eden Prairie, MN 55344
(952) 918-1800
Rank: #7-167.-16
The MacDuffie School
The MacDuffie School Photo - Aerial view of MacDuffie's 250 acre campus
(1)
Average ACT Score
(Out of 36):
28-30
Grades: 6-12, PG
66 School Street
Granby, MA 01033
(413) 255-0000
Rank: #7-167.-16
St. Andrew's School, DE
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.
(Episcopal)
(13)
Average ACT Score
(Out of 36):
28-30
Grades: 9-12
350 Noxontown Road
Middletown, DE 19709
(302) 285-4231
Rank: #7-167.-16
Saint John's Preparatory School
Saint John's Preparatory School Photo - We are located on 2900 of woodlands and lakes in Collegeville, MN
(Catholic)
Average ACT Score
(Out of 36):
28-30
Grades: 9-12, PG  | 6-12, PG (day)
2280 Watertower Road
Collegeville, MN 56321
(320) 363-3315
Rank: #7-167.-16
Santa Catalina School
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.
All-Girls (Catholic)
(1)
Average ACT Score
(Out of 36):
28-30
Grades: 9-12
1500 Mark Thomas Drive
Monterey, CA 93940
(831) 655-9356
Rank: #7-167.-16
Average ACT Score
(Out of 36):
28-30
Grades: 9-12, PG  | 7-12, PG (day)
19 Payson Avenue
Easthampton, MA 01027
(413) 529-3241
Rank: #7-167.-16
Woodberry Forest School
Woodberry Forest School Photo
All-Boys
(2)
Average ACT Score
(Out of 36):
28-30
Grades: 9-12
241 Woodberry Station
Woodberry Forest, VA 22989
(888) 798-9371
Rank: #17-2117.-21
Average ACT Score
(Out of 36):
26-28
Grades: 9-12
6155 Fountain Valley School Road
Colorado Springs, CO 80911
(719) 391-5251
Rank: #17-2117.-21
Kimball Union Academy
Kimball Union Academy Photo
(6)
Average ACT Score
(Out of 36):
26-28
Grades: 9-12, PG
7 Campus Center Drive
Meriden, NH 03770
(603) 469-2100
Rank: #17-2117.-21
Maur Hill - Mount Academy (MH-MA)
Maur Hill - Mount Academy (MH-MA) Photo
(Catholic)
Average ACT Score
(Out of 36):
26-28
Grades: 9-12
1000 Green St.
Atchison, KS 66002
(913) 367-5482
Rank: #17-2117.-21
Mount Michael Benedictine School
Mount Michael Benedictine School Photo
All-Boys (Catholic)
Average ACT Score
(Out of 36):
26-28
Grades: 9-12
22520 Mount Michael Road
Elkhorn, NE 68022
(402) 238-1457
Rank: #17-2117.-21
Saint James School
Saint James School Photo - Saint James' picturesque 800-acre campus is conveniently located only 70 miles from the Baltimore-Washington metropolitan area.
(Episcopal)
Average ACT Score
(Out of 36):
26-28
Grades: 8-12
17641 College Road
Hagerstown, MD 21740
(301) 733-9330
Rank: #22-3322.-33
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)
(1)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12, PG
101 Aspetuck Avenue
New Milford, CT 06776
(860) 210-3832
Rank: #22-3322.-33
Cheshire Academy
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.
(5)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12, PG
10 Main Street
Cheshire, CT 06410
(203) 439-7250
Rank: #22-3322.-33
Christ School
Christ School Photo
All-Boys (Episcopal)
(1)
Average ACT Score
(Out of 36):
24-26
Grades: 8-12
500 Christ School Road
Asheville, NC 28704
(828) 684-6232
Rank: #22-3322.-33
Dunn School
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.
Average ACT Score
(Out of 36):
24-26
Grades: 9-12  | 6-12 (day)
P.O. Box 98, 2555 W. Highway 154
Los Olivos, CA 93441
(800) 287-9197
Rank: #22-3322.-33
Holderness School
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.
(Episcopal)
(9)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12, PG
PO Box 1879
Plymouth, NH 03264
(603) 536-1747
Rank: #22-3322.-33
Average ACT Score
(Out of 36):
24-26
Grades: 8-12, PG
1000 Samuel Miller Loop
Charlottesville, VA 22903
(434) 818-1385
Rank: #22-3322.-33
Proctor Academy
Proctor Academy Photo - A community built on authentic relationships.
(12)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12, PG
204 Main Street - P.O. Box 500
Andover, NH 03216
(603) 735-6652
Rank: #22-3322.-33
St. Andrew's-Sewanee School
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.
(Episcopal)
(6)
Average ACT Score
(Out of 36):
24-26
Grades: 7-12  | 6-12 (day)
290 Quintard Rd.
Sewanee, TN 37375
(931) 598-5651
Rank: #22-3322.-33
Saint Bede Academy
Saint Bede Academy Photo - With an average student population of 300, our small class sizes offer students one-on-one interaction with their instructors.
(Catholic)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12
24 W US Highway 6
Peru, IL 61354
(815) 250-0285
Rank: #22-3322.-33
Saint Mary's School
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!
All-Girls (Episcopal)
(1)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12
900 Hillsborough Street
Raleigh, NC 27603
(919) 424-4100
Rank: #22-3322.-33
Saint Stanislaus High School
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.
All-Boys (Catholic)
Average ACT Score
(Out of 36):
24-26
Grades: 7-12
304 S. Beach Blvd.
Bay St. Louis, MS 39520
(228) 467-9057
Rank: #22-3322.-33
San Marcos Academy
San Marcos Academy Photo - San Marcos Academy has offered a tradition of excellence in private, Christian education since 1907.
(Baptist)
Average ACT Score
(Out of 36):
24-26
Grades: 6-12  | Pre-K-12 (day)
2801 Ranch Road 12
San Marcos, TX 78666
(800) 428-5120
Rank: #34-4134.-41
Camden Military Academy
Camden Military Academy Photo - A proud family!
All-Boys
(18)
Average ACT Score
(Out of 36):
<24
Grades: 7-12, PG
520 Hwy. 1 North
Camden, SC 29020
(803) 432-6001
Rank: #34-4134.-41
Eagle Hill School
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.
(2)
Average ACT Score
(Out of 36):
<24
Grades: 8-12
P.O. Box 116 , 242 Old Petersham Road
Hardwick, MA 01037
(413) 477-6000
Rank: #34-4134.-41
Average ACT Score
(Out of 36):
<24
Grades: 9-12, PG  | K-12, PG (day)
65-1692 Kohala Mountain Road
Kamuela, HI 96743
(808) 881-4321
Rank: #34-4134.-41
Missouri Military Academy
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.
All-Boys
(7)
Average ACT Score
(Out of 36):
<24
Grades: 7-12, PG
204 Grand Street
Mexico, MO 65265
(573) 581-1776
Rank: #34-4134.-41
Riverside Preparatory Academy
Riverside Preparatory Academy Photo
All-Boys
(5)
Average ACT Score
(Out of 36):
<24
Grades: 6-12
2001 Riverside Drive
Gainesville, GA 30501
(877) 692-2338
Rank: #34-4134.-41
Ross School
Ross School Photo
Average ACT Score
(Out of 36):
<24
Grades: 6-12, PG  | PK-12, PG (day)
18 Goodfriend Drive
East Hampton, NY 11937
(631) 907-5400
Rank: #34-4134.-41
St. John's Northwestern Academies
St. John's Northwestern Academies Photo - Two graduating seniors.
(Episcopal)
(4)
Average ACT Score
(Out of 36):
<24
Grades: 6-12, PG
1101 Genesee Street
Delafield, WI 53018
(262) 646-7199
Rank: #34-4134.-41
Tilton School
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.
(1)
Average ACT Score
(Out of 36):
<24
Grades: 9-12, PG
30 School Street
Tilton, NH 03276
(603) 286-1733

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