Smallest Average Class Size

Among "All-Girls Schools", view the boarding schools with the smallest average class sizes (2026).
Keep in mind that small statistical differences in average class sizes between schools do not always indicate better student performance at one school or another.
Also keep in mind that boarding schools in general have smaller average class sizes than public schools - even for schools with larger class sizes, a "large" class in a boarding school would still often be considered small by public school standards which often have class sizes of 20 students.
Academy of the Holy Family
Chatham Hall
Oldfields School
St. Timothy's School
Grier School
Buffalo Seminary
Miss Hall's School
St. Margaret's School
Stoneleigh-Burnham School
Dana Hall School
The Ethel Walker School
The Madeira School
Miss Porter's School
Westover School
Santa Catalina School
Foxcroft School
Garrison Forest School
Branksome Hall
# Students Range: 8 18 Avg. # Students: 11

Smallest Average Class Size

Among All-Girls Schools (out of 19 schools)

Sorted by range (alphabetically within range)
Academy of the Holy Family Photo - Ambassadors Club
Gr: 9-12
All-girls (Roman Catholic)
54 W. Main Street Box 691
Baltic, CT 06330
(860) 822-6279
Chatham Hall Photo - Chatham Hall's campus was built to promote community and collaboration.
#1(T1–T4)Chatham Hall
Gr: 9-12
All-girls (Episcopal)
800 Chatham Hall Circle
Chatham, VA 24531
(434) 432-5516
(5)
Oldfields School Photo - Oldfields School`s Mission is to embrace each student`s authentic self, educate through collaboration, empower the individual voice, and inspire confidence and continual growth, leading to a life of purpose.
#1(T1–T4)Oldfields School
Gr: 8-12, PG
All-girls (non-sectarian)
1500 Glencoe Road
Sparks Glencoe, MD 21152
(443) 662-1009
(12)
St. Timothy's School Photo - Completed in 2012, Dixon Hall is our state-of-the-art academic building. The technology-rich facility features the Taft Lecture Hall, the Coleman World Languages and Cultures Center, and a Center for Learning and Teaching.
Gr: 9-12, PG
All-girls (Episcopal)
8400 Greenspring Avenue
Stevenson, MD 21153
(410) 486-7401
(2)
Grier School Photo
Gr: 7-12, PG | 5-12, PG (day)
All-girls
2522 Grier School Road
Tyrone, PA 16686
(814) 684-3000
(6)
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. ..
#6(T6–T9)Buffalo Seminary
Gr: 9-12, PG
All-girls (non-sectarian)
205 Bidwell Parkway
Buffalo, NY 14222
(716) 885-6780
Miss Hall's School Photo - A talented, supportive community of learners awaits you at MHS. Our faculty are dedicated mentors who are passionate about their subjects and creative in their teaching, unafraid to ditch the textbook in favor of collaborative, project-based learning.
Gr: 9-12, PG
All-girls
492 Holmes Road
Pittsfield, MA 01201
(413) 499-1300
(4)
St. Margaret's School Photo - College Preparedness: Challenge yourself with a collaborative STEAM curriculum and rigorous academics, including Advanced Placement and Dual Enrollment courses to start earning college credit. Our college counselor will help you to navigate the different colleges and degree fields to best prepare you for life after graduation from St. Margaret's.
Gr: 8-12, PG
All-girls (Episcopal)
PO Box 158, 444 Water Lane
Tappahannock, VA 22560
(804) 443-3357
(7)
Stoneleigh-Burnham School Photo - Our challenging and supportive learning environment encourages appropriate risk-taking by providing a safe space for making mistakes. Stoneleigh-Burnham School offers the International Baccalaureate (IB) Diploma Programme.
Gr: 7-12, PG
All-girls
574 Bernardston Road
Greenfield, MA 01301
(413) 774-2711
(15)
Dana Hall School Photo - The Dana Hall Dragons are ready to roar.
#10(T10–T15)Dana Hall School
Gr: 9-12 | 5-12 (day)
All-girls
45 Dana Road
Wellesley, MA 02482
(781) 489-1331
(6)
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
The Madeira School Photo - Capitol Hill internships in the offices of senators and representatives are a hallmark of the junior year at Madeira
#10(T10–T15)The Madeira School
Gr: 9-12
All-girls
8328 Georgetown Pike
McLean, VA 22102
(703) 556-8273
(2)
Miss Porter's School Photo
#10(T10–T15)Miss Porter's School
Gr: 9-12
All-girls
60 Main Street
Farmington, CT 06032
(860) 409-3530
(5)
Westover School Photo
#10(T10–T15)Westover School
Gr: 9-12
All-girls
1237 Whittemore Rd.
Middlebury, CT 06762
(203) 577-4521
(12)
Raleigh, NC
#15(T15–T17)Saint Mary's School
Gr: 9-12
All-girls (Episcopal)
900 Hillsborough Street
Raleigh, NC 27603
(919) 424-4100
(1)
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.
#15(T15–T17)Santa Catalina School
Gr: 9-12
All-girls (Catholic)
1500 Mark Thomas Drive
Monterey, CA 93940
(831) 655-9356
(1)
Foxcroft School Photo - Schoolhouse
#17(T17–T18)Foxcroft School
Gr: 9-12, PG
All-girls
22407 Foxhound Lane
Middleburg, VA 20117
(540) 687-4340
(9)
Garrison Forest School Photo - One of the entrances to Garrison Forest School.
Gr: 8-12 | PK-12 (day)
All-girls
300 Garrison Forest Road
Owings Mills, MD 21117
(410) 559-3111
Branksome Hall Photo
#19(T19–T21)Branksome Hall
Gr: 7-12 | PK-12 (day)
All-girls
10 Elm Avenue
Toronto, Canada m4w 1n4
(416) 920-9741

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