Chatham Hall Photo - Chatham Hall's variety of dynamic and unique programming includes the prestigious Leader and Writer in Residence programs, which bring world leaders to campus to meet with students. Past guests include Venus Williams, Jane Goodall, Gloria Steinem, and Elizabeth Acevedo.

Highest Average ACT Scores

Among "Schools with < 200 Students", view the boarding schools with the highest average ACT scores (2026-27).
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
32 Avg. Average ACT Score
(Out of 36):
26

Trends in Average ACT Score

Highest Average ACT Scores

Among Schools with < 200 Students (out of 27 schools)

Sorted by range (alphabetically within range)
Boarding School
Average ACT Score
(Out of 36)
Grades
Location
Rank: #11
Wayland Academy
Wayland Academy Photo - Wayland Hall, the most historic buildings on campus, currently houses first-year and sophomore boys. The interior was remodeled recently and offers some of the nicest rooms and gathering spaces on any campus in America.
(4)
Average ACT Score
(Out of 36):
>32
Grades: 9-12, PG
101 North University
Beaver Dam, WI 53916
(800) 860-7725
Rank: #2-42.-4
Linden Hall School for Girls
Linden Hall School for Girls Photo
All-Girls
Average ACT Score
(Out of 36):
30-32
Grades: 6-12, PG
212 E Main Street
Lititz, PA 17543
(717) 626-8512
Rank: #2-42.-4
Marvelwood School
Marvelwood School Photo - We offer a wide variety of competitive athletics each season.
Average ACT Score
(Out of 36):
30-32
Grades: 9-12, PG
476 Skiff Mountain Road
Kent, CT 06757
(860) 927-0047
Rank: #2-42.-4
Thomas Jefferson School
Thomas Jefferson School Photo - TJ sits on 20 picturesque acres in suburban St. Louis, MO.
(2)
Average ACT Score
(Out of 36):
30-32
Grades: 7-12
4100 South Lindbergh Blvd.
Saint Louis, MO 63127
(314) 843-4151
Rank: #5-75.-7
Dublin School
Dublin School Photo - There`s dramatic beauty that is apparent on your first visit to Dublin. Surrounded by unspoiled forests, pristine lakes and Mt. Monadnock - the most climbed mountain in the world, our 500-acre campus supports a vibrant and supportive community of scholars, artists and athletes.
(1)
Average ACT Score
(Out of 36):
28-30
Grades: 9-12
18 Lehmann Way, PO Box 522
Dublin, NH 03444
(603) 563-7075
Rank: #5-75.-7
Southern Preparatory Academy
Southern Preparatory Academy Photo - As the leading college preparatory school in Camp Hill for girls and boys in grades 7-12, Southern Prep prepares students for success in college and in life. Within the framework of Christian example, our students are challenged to think, inspired to create, empowered to lead, motivated to win, and prepared to reach their God-given potential now and in the future.
(3)
Average ACT Score
(Out of 36):
28-30
Grades: 7-12
174 Ward Circle
Camp Hill, AL 36850
(256) 790-9202
Rank: #5-75.-7
Westover School
Westover School Photo
All-Girls
(12)
Average ACT Score
(Out of 36):
28-30
Grades: 9-12, PG
1237 Whittemore Rd.
Middlebury, CT 06762
(203) 577-4521
Rank: #8-138.-13
The Knox School
The Knox School Photo - The Knox School is a premier boarding and day school located on 35 acres of waterfront property along the North Shore of Long Island. Accessible to New York City, JFK International Airport, and the Ferry to Connecticut.
(3)
Average ACT Score
(Out of 36):
26-28
Grades: 6-12, PG
541 Long Beach Road
Saint James, Long Island, NY 11780
(631) 686-1600
Rank: #8-138.-13
La Lumiere School
La Lumiere School Photo - La Lumiere School is a private, independent boarding and day school founded in 1963, located in La Porte, Indiana, on an idyllic 190-acre wooded campus. At La Lumiere, we form character, cultivate scholarship, and explore faith in order to grow into more complete versions of ourselves.
(Catholic)
Average ACT Score
(Out of 36):
26-28
Grades: 9-12, PG
6801 N. Wilhelm Road
La Porte, IN 46350
(219) 326-7450
Rank: #8-138.-13
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: #8-138.-13
St. Bernard Preparatory School
St. Bernard Preparatory School Photo - Academic achievement is high on the list of St. Bernard Prep priorities, with students consistently ranking above national and state averages in ACT and National Merit Exams.
(Catholic)
Average ACT Score
(Out of 36):
26-28
Grades: 7-12
1600 St. Bernard Drive, S.E.
Cullman, AL 35055
(256) 255-5890
Rank: #8-138.-13
Subiaco Academy
Subiaco Academy Photo - Named by Architecture Digest as one of "The World's Most Beautiful Boarding Schools," the modified Romanesque style architecture was rebuilt in 1959 using native sandstone taken from our own quarries about a mile northeast of the Abbey.
All-Boys (Catholic)
(4)
Average ACT Score
(Out of 36):
26-28
Grades: 7-12
405 North Subiaco Avenue
Subiaco, AR 72865
(479) 934-1000
Rank: #8-138.-13
THINK Global School
THINK Global School Photo - THINK Global School is comprised of 30 high school students who hail from all over the world. It's an opportunity to live next to and learn from a truly global student body.
Average ACT Score
(Out of 36):
26-28
Grades: 11-12
1460 Broadway Street #4027
New York, NY 10036
(646) 768-0302
Rank: #14-2214.-22
Besant Hill School
Besant Hill School Photo - Besant Hill School is located in the Ojai Valley, on 500 acres of private land with beautiful vistas in every direction. Facilities include four dormitories, outdoor sports facilities including a new aquatic center, indoor theater, atelier, and classrooms nestled along winding paths and oak trees. We also have an eight acre organic farm.
(1)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12, PG
8585 Ojai Santa Paula Road
Ojai, CA 93023
(805) 646-4343
Rank: #14-2214.-22
Buffalo Seminary
Buffalo Seminary Photo - Our oldest tradition may be forward thinking but we are anchored in many other traditions too. Roses and white dresses for commencement. Our Social & Academic Honor Code. Morning Meeting to start the day. ..
All-Girls
Average ACT Score
(Out of 36):
24-26
Grades: 9-12, PG
205 Bidwell Parkway
Buffalo, NY 14222
(716) 885-6780
Rank: #14-2214.-22
Chatham Hall
Chatham Hall Photo - Our students thrive in a dynamic environment designed specifically for their success.
All-Girls (Episcopal)
(5)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12
800 Chatham Hall Circle
Chatham, VA 24531
(434) 432-5516
Rank: #14-2214.-22
Average ACT Score
(Out of 36):
24-26
Grades: 9-12
500 Holden Way
Carbondale, CO 81623
(970) 963-2562
Average ACT Score
(Out of 36):
24-26
Grades: 9-12  | 5-12 (day)
255 Olympic Valley Road | P.O. Box 2180
Olympic Valley, CA 96146
(801) 336-0753
Rank: #14-2214.-22
Michigan Lutheran High School
Michigan Lutheran High School Photo - Michigan Lutheran High School opened its best-in-class dormitory in August 2014. We are only one of six boarding schools recognized by the state of Michigan.
(Christian)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12
615 East Marquette Woods Road
St. Joseph, MI 49085
(269) 429-7861
Rank: #14-2214.-22
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: #14-2214.-22
St. Lawrence Seminary High School
St. Lawrence Seminary High School Photo
All-Boys (Catholic)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12
301 Church Street
Mt. Calvary, WI 53057
(920) 753-7570
Rank: #14-2214.-22
West Nottingham Academy
West Nottingham Academy Photo - Nestled on 100 acres in northeast Maryland, WNA is geographically situated among Washington DC, Baltimore, MD, Wilmington, DE, Philadelphia, PA New York City, and the Delaware beaches. A campus where students learn and play.
(10)
Average ACT Score
(Out of 36):
24-26
Grades: 9-12, PG
1079 Firetower Road
Colora, MD 21917
(410) 658-9224
Rank: #23-2723.-27
Colorado Timberline Academy
Colorado Timberline Academy Photo - Fall Trip in the Slot Canyons
(5)
Average ACT Score
(Out of 36):
<24
Grades: 9-12, PG
454 Academy Drive
Durango, CO 81301
(970) 247-5898
Rank: #23-2723.-27
Average ACT Score
(Out of 36):
<24
Grades: 9-12
4 Lustre High Circle
Lustre, MT 59225
(406) 392-5735
Rank: #23-2723.-27
Middlebridge School
Middlebridge School Photo
Average ACT Score
(Out of 36):
<24
Grades: 8-12, PG
333 Ocean Road
Narragansett, RI 02882
(401) 788-0800
Rank: #23-2723.-27
Northwood School
Northwood School Photo
(1)
Average ACT Score
(Out of 36):
<24
Grades: 9-12, PG
92 Northwood Road
Lake Placid, NY 12946
(518) 523-3382
Rank: #23-2723.-27
Oakwood Friends School
Oakwood Friends School Photo - Autumn colors on campus
(Quaker)
Average ACT Score
(Out of 36):
<24
Grades: 9-12  | 6-12 (day)
22 Spackenkill Road
Poughkeepsie, NY 12603
(845) 462-4200

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