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.
# 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)
Boarding School
# Students
Grades
Location
Rank: #1-41.-4
Academy of the Holy Family ![Academy of the Holy Family Photo - Ambassadors Club]( "Academy of the Holy Family Photo - Ambassadors Club")
All-Girls (Catholic)
# Students: 8
Grades: 9-12
54 W. Main Street Box 691
Baltic, CT 06330
(860) 822-6279
Baltic, CT 06330
(860) 822-6279
Rank: #1-41.-4
# Students: 8
Grades: 9-12
800 Chatham Hall Circle
Chatham, VA 24531
(434) 432-5516
Chatham, VA 24531
(434) 432-5516
Rank: #1-41.-4
# Students: 8
Grades: 8-12, PG
1500 Glencoe Road
Sparks Glencoe, MD 21152
(443) 662-1009
Sparks Glencoe, MD 21152
(443) 662-1009
Rank: #1-41.-4
# Students: 8
Grades: 9-12, PG
8400 Greenspring Avenue
Stevenson, MD 21153
(410) 486-7401
Stevenson, MD 21153
(410) 486-7401
Rank: #55
# Students: 9
Grades: 7-12, PG | 5-12, PG (day)
2522 Grier School Road
Tyrone, PA 16686
(814) 684-3000
Tyrone, PA 16686
(814) 684-3000
Rank: #6-96.-9
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. ..]( "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
# Students: 10
Grades: 9-12, PG
205 Bidwell Parkway
Buffalo, NY 14222
(716) 885-6780
Buffalo, NY 14222
(716) 885-6780
Rank: #6-96.-9
# Students: 10
Grades: 9-12, PG
492 Holmes Road
Pittsfield, MA 01201
(413) 499-1300
Pittsfield, MA 01201
(413) 499-1300
Rank: #6-96.-9
# Students: 10
Grades: 8-12, PG
PO Box 158, 444 Water Lane
Tappahannock, VA 22560
(804) 443-3357
Tappahannock, VA 22560
(804) 443-3357
Rank: #6-96.-9
# Students: 10
Grades: 7-12, PG
574 Bernardston Road
Greenfield, MA 01301
(413) 774-2711
Greenfield, MA 01301
(413) 774-2711
Rank: #10-1510.-15
# Students: 12
Grades: 9-12 | 5-12 (day)
45 Dana Road
Wellesley, MA 02482
(781) 489-1331
Wellesley, MA 02482
(781) 489-1331
Rank: #10-1510.-15
The Ethel Walker School ![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.]( "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.")
All-Girls
# Students: 12
Grades: 7-12, PG | 6-12, PG (day)
230 Bushy Hill Road
Simsbury, CT 06070
(860) 408-4200
Simsbury, CT 06070
(860) 408-4200
Rank: #10-1510.-15
# Students: 12
Grades: 9-12
8328 Georgetown Pike
McLean, VA 22102
(703) 556-8273
McLean, VA 22102
(703) 556-8273
Rank: #10-1510.-15
# Students: 12
Grades: 9-12
60 Main Street
Farmington, CT 06032
(860) 409-3530
Farmington, CT 06032
(860) 409-3530
Rank: #10-1510.-15
# Students: 12
Grades: 9-12
1237 Whittemore Rd.
Middlebury, CT 06762
(203) 577-4521
Middlebury, CT 06762
(203) 577-4521
Rank: #15-1715.-17
# Students: 13
Grades: 9-12
900 Hillsborough Street
Raleigh, NC 27603
(919) 424-4100
Raleigh, NC 27603
(919) 424-4100
Rank: #15-1715.-17
# Students: 13
Grades: 9-12
1500 Mark Thomas Drive
Monterey, CA 93940
(831) 655-9356
Monterey, CA 93940
(831) 655-9356
Rank: #17-1817.-18
# Students: 14
Grades: 9-12, PG
22407 Foxhound Lane
Middleburg, VA 20117
(540) 687-4340
Middleburg, VA 20117
(540) 687-4340
Rank: #18-1918.-19
Garrison Forest School ![Garrison Forest School Photo - One of the entrances to Garrison Forest School.]( "Garrison Forest School Photo - One of the entrances to Garrison Forest School.")
All-Girls
# Students: 15
Grades: 8-12 | PK-12 (day)
300 Garrison Forest Road
Owings Mills, MD 21117
(410) 559-3111
Owings Mills, MD 21117
(410) 559-3111
Rank: #19-2119.-21
Branksome Hall ![Branksome Hall Photo]( "Branksome Hall Photo")
All-Girls
# Students: >15
Grades: 7-12 | PK-12 (day)
10 Elm Avenue
Toronto, Canada m4w 1n4
(416) 920-9741
Toronto, Canada m4w 1n4
(416) 920-9741
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