Smallest Average Class Size

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All Schools 
400+ students
400+ students 
200-400 students
200-400 students 
< 200 students
< 200 students 
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  • Among "All Schools", view the boarding schools with the smallest average class sizes (2020-21).
  • 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.

Smallest Average Class Size (2020-21)

Sorted by range (alphabetically within range)
  • Boarding School # Students Grades Location
  • 1.-2.Rank: #1-2
    4
    Grades: 6-12
    14 Greenwood Lane
    PutneyVT 05346
    (802)387-4545
  • 1.-2.Rank: #1-2
    4

    Grades: 3-10
    28 Patey Circle
    RindgeNH 03461
    (603)899-3325
  • 3.-6.Rank: #3-6
    5
    Grades: 5-12, PG | K-12, PG (day)
    54-230 Kamehameha Hwy
    HauulaHI 96717
    (808)670-1909
  • 3.-6.Rank: #3-6
    5

    Grades: 1-8
    128 Oakland Farm Way
    TroyVA 22974
    (434)293-9059
  • 3.-6.Rank: #3-6
    5

    Grades: 6-12 | Pre-K-12 (day)
    PO Box 3050, 198 Main St.
    Chester/Lake AlmanorCA 96020
    (530)596-3343
  • 3.-6.Rank: #3-6
    5

    Grades: 6-12, PG
    93 Camp School Road
    WolfeboroNH 03894
    (603)569-3451
  • 7.-12.Rank: #7-12
    6
    Grades: 9-12, PG
    454 Academy Drive
    DurangoCO 81301
    (970)247-5898
  • 7.-12.Rank: #7-12
    6

    Grades: 8-12
    P.O. Box 116 , 242 Old Petersham Road
    HardwickMA 01037
    (413)477-6000
  • 7.-12.Rank: #7-12
    6

    Grades: 8-12, PG
    Dorfstrasse
    6085 Hasliberg GoldernSwitzerland 6085
    41339729292
  • 7.-12.Rank: #7-12
    6

    Grades: 9-12, PG
    3042 College St.
    AustinburgOH 44010
    (440)275-2811
  • 7.-12.Rank: #7-12
    6

    Grades: 9-12 | 2-12 (day)
    P.O. Box 227
    Prides CrossingMA 01965
    (978)236-3000
  • 7.-12.Rank: #7-12
    6

    Grades: 7-12, PG
    333 Ocean Road
    NarragansettRI 02882
    (401)788-0800
  • 13.-16.Rank: #13-16
    7
    Grades: 9-12
    6544 Murray Lane
    BrentwoodTN 37027
    (615)507-3173
  • 13.-16.Rank: #13-16
    Hoosac School
    Hoosac School Photo - Hoosac School was founded in 1889.
    (Episcopal)
    7

    Grades: 8-12, PG
    PO Box 9
    HoosickNY 12089
    (518)686-7331
  • 13.-16.Rank: #13-16
    Olney Friends School
    Olney Friends School Photo - Each Wednesday, students take part in a dedicated three-hour art block with advanced art electives offered throughout the week. Recently, Olney has offered Murals, Digital Video, Impressionistic Art, Scaling and Scenery, Theater, Guitar, Native Art, Woodworking and Box Making courses.
    (Society of Friends)
    7

    Grades: 9-12
    61830 Sandy Ridge Road
    BarnesvilleOH 43713
    (740)425-3655
  • 13.-16.Rank: #13-16
    The Phelps School
    The Phelps School Photo - We are live and in person!
    All-Boys 
    7

    Grades: 6-12, PG
    583 Sugartown Road
    MalvernPA 19355
    (610)644-1754
  • 17.-33.Rank: #17-33
    8
    Grades: 7-12
    PO Box 388
    BalsamNC 28707
    (828)456-3435
  • 17.-33.Rank: #17-33
    Academy of the Holy Family
    Academy of the Holy Family Photo - Basketball Team
    All-Girls  (Catholic)
    8

    Grades: 9-12
    54 W. Main Street Box 691
    BalticCT 06330
    (860)822-6279
  • 17.-33.Rank: #17-33
    8

    Grades: 6-12, PG
    1701 Brandon Hall Drive
    AtlantaGA 30350
    (770)394-8177
  • 17.-33.Rank: #17-33
    Chatham Hall
    Chatham Hall Photo - Our traditions are a vital force: They bridge the generations, bond students, and help us continually build our community. Best of all, they're a lot of fun (and they help make Chatham Hall the unique place it is).
    All-Girls  (Episcopal)
    8

    Grades: 9-12
    800 Chatham Hall Circle
    ChathamVA 24531
    (434)432-5516
  • 17.-33.Rank: #17-33
    8

    Grades: 5-12
    1950 S. Academy Dr
    MelbourneFL 32901
    (321)723-3211
  • 17.-33.Rank: #17-33
    8

    Grades: 4-9
    4382 Cascade Road
    Lake PlacidNY 12946
    (518)523-9329
  • 17.-33.Rank: #17-33
    Oak Hill Academy
    Oak Hill Academy Photo
    (Baptist)
    8

    Grades: 8-12
    2635 Oak Hill Road
    Mouth of WilsonVA 24363
    (276)579-2619
  • 17.-33.Rank: #17-33
    Oldfields School
    Oldfields School Photo - Our community has a wonderful reopening experience under our belts, and we are looking forward to the months ahead! Oldfields is operating on campus and in person for the 2020-2021 school year.
    All-Girls 
    8

    Grades: 8-12
    1500 Glencoe Road
    Sparks GlencoeMD 21152
    (410)472-4800
  • 17.-33.Rank: #17-33
    8

    Grades: 9-12, PG
    1 Rock Point Road
    BurlingtonVT 05408
    (802)863-1104
  • 17.-33.Rank: #17-33
    8

    Grades: 9-12, PG | 6-12, PG (day)
    63 Federal Road
    BarringtonRI 02806
    (401)246-1230
  • 17.-33.Rank: #17-33
    St. Thomas More School
    St. Thomas More School Photo
    All-Boys  (Catholic)
    8

    Grades: 8-12, PG
    45 Cottage Road
    OakdaleCT 06370
    (860)823-3861
  • 17.-33.Rank: #17-33
    St. Timothy's School
    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.
    All-Girls  (Episcopal)
    8

    Grades: 9-12, PG
    8400 Greenspring Avenue
    StevensonMD 21153
    (410)486-7401
  • 17.-33.Rank: #17-33
    8

    Grades: 9-12
    1951 Delta Avenue
    West BranchIA 52358
    (319)519-1856
  • 17.-33.Rank: #17-33
    8

    Grades: 9-12, PG
    235 Squaw Valley Road | P.O. Box 2667
    Olympic ValleyCA 96146
    (530)583-9393
  • 17.-33.Rank: #17-33
    8

    Grades: 9-12, PG
    42605 RCR 36
    Steamboat SpringsCO 80487
    (970)879-1350
  • 17.-33.Rank: #17-33
    8

    Grades: 6-12
    22000 Hwy 27
    Lake WalesFL 33859
    (863)676-6091
  • 17.-33.Rank: #17-33
    8

    Grades: 9-12, PG
    172 Ash Street
    WinchendonMA 01475
    (978)297-4476
  • 34.-46.Rank: #34-46
    Blue Ridge School
    Blue Ridge School Photo - Our lake offers students a chance to relax, fish, canoe - in the center of campus.
    All-Boys  (Episcopal)
    9
    Grades: 9-12
    273 Mayo Drive
    St. GeorgeVA 22935
    (434)985-2811
  • 34.-46.Rank: #34-46
    9

    Grades: 9-12, PG
    291 South Street
    WilliamstownMA 01267
    (413)458-3919
  • 34.-46.Rank: #34-46
    9

    Grades: 9-12
    Floor 2, 50/60 Station Road
    CambridgeUnited Kingdom CB1 2JH
    +44 1223 345698
  • 34.-46.Rank: #34-46
    9

    Grades: 9-12, PG
    110 Darrow Road
    New LebanonNY 12125
    (518)704-2765
  • 34.-46.Rank: #34-46
    9

    Grades: 9-12, PG
    12 Norfolk Road, P.O. Box 80
    LitchfieldCT 06759
    (860)567-1802
  • 34.-46.Rank: #34-46
    Grier School
    Grier School Photo
    All-Girls 
    9

    Grades: 7-12, PG
    2522 Grier School Road
    TyronePA 16686
    (814)684-3000
  • 34.-46.Rank: #34-46
    9

    Grades: 8-12, PG
    1000 Samuel Miller Loop
    CharlottesvilleVA 22903
    (434)823-4805
  • 34.-46.Rank: #34-46
    9

    Grades: 8-12, PG
    1000 Orme School Road, H.C. 63, Box 3040
    MayerAZ 86333
    (928)632-7601
  • 34.-46.Rank: #34-46
    9

    Grades: 6-12 | K-12 (day)
    2801 Ranch Road 12
    San MarcosTX 78666
    (800)428-5120
  • 34.-46.Rank: #34-46
    9

    Grades: 6-12, PG
    2800 Monterey Road
    San MarinoCA 91108
  • 34.-46.Rank: #34-46
    9

    Grades: 6-9
    253 Bushy Hill Road
    IvorytonCT 06442
    (860)767-0848
  • 34.-46.Rank: #34-46
    9

    Grades: 9-12, PG
    Suffield Academy
    SuffieldCT 06078
    (860)386-4440
  • 34.-46.Rank: #34-46
    9

    Grades: 9-12
    241 Woodberry Station
    Woodberry ForestVA 22989
    (888)798-9371
  • 47.-80.Rank: #47-80
    10
    Grades: 9-12, PG
    8585 Ojai Santa Paula Road
    OjaiCA 93023
    (805)646-4343
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12
    1960 Cate Mesa Road, P.O. Box 5005
    CarpinteriaCA 93013
    (805)684-4127
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12, PG
    785 Beaver Street
    WalthamMA 02452
    (781)314-0806
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12, PG
    10 Main Street
    CheshireCT 06410
    (203)439-7250
  • 47.-80.Rank: #47-80
    10

    Grades: 6-12, PG | 3-12, PG (day)
    Route de Belfort 10
    PorrentruySwitzerland 2900
    +41 32 466 11 57
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12
    18 Lehmann Way, PO Box 522
    DublinNH 03444
    (603)563-7075
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12 | 6-12 (day)
    P.O. Box 98, 2555 W. Highway 154
    Los OlivosCA 93441
    (800)287-9197
  • 47.-80.Rank: #47-80
    Eaglebrook School
    Eaglebrook School Photo - Eaglebrook School teaches middle school boys the skills they will need for the rest of their lives. Learn more about our Core Skills at https://www.eaglebrook.org/coreskills.
    All-Boys 
    10

    Grades: 6-9
    271 Pine Nook Road, P.O. Box 7
    DeerfieldMA 01342
    (413)774-9111
  • 47.-80.Rank: #47-80
    10

    Grades: 7-12
    225 S. Wayne Avenue
    WaynesboroVA 22980
    (540)946-7706
  • 47.-80.Rank: #47-80
    Freeman Academy
    Freeman Academy Photo - Freeman Academy - Faith-inspired learning for LIFE
    (Christian)
    10

    Grades: 7-12 | K-12 (day)
    PO BOX 1000748 S. Main St.
    FreemanSD 57029
    (605)925-4237
  • 47.-80.Rank: #47-80
    10

    Grades: 6-12, PG
    280 King Street East
    BrockvilleCanada K6V1E2
    (613)341-9330
  • 47.-80.Rank: #47-80
    Hargrave Military Academy
    Hargrave Military Academy Photo - Respect! Integrity! Success! Earn it at Hargrave!
    All-Boys  (Baptist)
    10

    Grades: 7-12, PG
    200 Military Drive
    ChathamVA 24531
    (800)432-2480
  • 47.-80.Rank: #47-80
    10

    Grades: 5-9 | Pre-K-9 (day)
    211 Indian Mountain Road
    LakevilleCT 06039
    (435)480-0871
  • 47.-80.Rank: #47-80
    La Lumiere School
    La Lumiere School Photo - Our liberal arts curriculum provides a foundation in English literature and composition, mathematics, social and physical sciences, world languages, theology, ethics, and the creative arts, with a special emphasis on critical thinking and the mastery of oral and written communication.
    (Catholic)
    10

    Grades: 9-12, PG
    6801 N. Wilhelm Road
    La PorteIN 46350
    (219)326-7450
  • 47.-80.Rank: #47-80
    10

    Grades: 7-12, PG
    Chemin de la Source
    LeysinSwitzerland 1854
    0041244934888
  • 47.-80.Rank: #47-80
    Linden Hall School
    Linden Hall School Photo
    All-Girls 
    10

    Grades: 6-12, PG
    212 East Main Street
    LititzPA 17543
    (717)626-8512
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12
    4 Lustre High Circle
    LustreMT 59225
    (406)392-5735
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12, PG
    476 Skiff Mountain Road
    KentCT 06757
    (860)927-0047
  • 47.-80.Rank: #47-80
    10

    Grades: 5-12, PG
    614 South Main Street
    WoodstockVA 22664
    (540)459-2167
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12, PG
    118 Main Street East, Merrickville, Ontario
    MerrickvilleCanada K0G1N
    (613)269-2064
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12
    PO Box 8 / 5100 Figueroa Mountain Road
    Los OlivosCA 93441
    (805)688-5114
  • 47.-80.Rank: #47-80
    Miss Hall's School
    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.
    All-Girls 
    10

    Grades: 9-12, PG
    492 Holmes Road
    PittsfieldMA 01201
    (413)499-1300
  • 47.-80.Rank: #47-80
    10

    Grades: 8-12
    78 Academy Avenue
    Cornwall-on-HudsonNY 12520
    (845)534-3710
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12
    1500 Port Arthur Road
    LadysmithWI 54848
    (715)532-0201
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12, PG
    92 Northwood Road
    Lake PlacidNY 12946
    (518)523-3382
  • 47.-80.Rank: #47-80
    10

    Grades: 5-9 | Pre-K-9 (day)
    P.O. Box 68 528 Pomfret Street
    PomfretCT 06258
    (860)928-1328
  • 47.-80.Rank: #47-80
    St. George's School
    St. George's School Photo - Our 125-acre campus is on a hilltop overlooking the ocean.
    (Episcopal)
    10

    Grades: 9-12
    P.O. Box 1910
    NewportRI 02840
    (401)842-6600
  • 47.-80.Rank: #47-80
    10

    Grades: 7-12
    1101 Genesee Street
    DelafieldWI 53018
    (800)752-2338
  • 47.-80.Rank: #47-80
    St. Margaret's School
    St. Margaret's School Photo - WE BELIEVE YOU BELONG HERE. * 10 acre historic waterfront campus * 42 acre athletic complex * Within 2 hours of Washington, DC, Richmond, Charlottesville, Williamsburg, and Virginia Beach
    All-Girls  (Episcopal)
    10

    Grades: 8-12, PG
    PO Box 158, 444 Water Lane
    TappahannockVA 22560
    (804)443-3357
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12, PG
    6832 Phillips Mill Road
    New HopePA 18938
    (215)862-5261
  • 47.-80.Rank: #47-80
    10

    Grades: 7-12, PG
    574 Bernardston Road
    GreenfieldMA 01301
    (413)774-2711
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12, PG
    10 Long Walk
    Saxtons RiverVT 05154
    (802)869-6229
  • 47.-80.Rank: #47-80
    10

    Grades: 7-12 | 6-12 (day)
    319 Webb Road East
    Bell BuckleTN 37020
    (931)389-6003
  • 47.-80.Rank: #47-80
    10

    Grades: 9-12, PG
    371 West Farm Road
    BethlehemNH 03574
    (603)444-2928
  • 81.-105.Rank: #81-105
    11
    Grades: 9-12, PG
    500 Old Farms Road
    AvonCT 06001
    (800)464-2866
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12, PG
    80 Academy Drive
    WolfeboroNH 03894
    (603)569-7200
  • 81.-105.Rank: #81-105
    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 
    11

    Grades: 9-12, PG
    205 Bidwell Parkway
    BuffaloNY 14222
    (716)885-6780
  • 81.-105.Rank: #81-105
    Christ School
    Christ School Photo
    All-Boys  (Episcopal)
    11

    Grades: 8-12
    500 Christ School Road
    AshevilleNC 28704
    (828)684-6232
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12
    1200 N. Quaker Lane
    AlexandriaVA 22302
    (877)933-4347
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12, PG
    PO Box 860
    BethelME 04217
    (207)824-7777
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12
    1 Elm Street
    ByfieldMA 01922
    (978)499-3120
  • 81.-105.Rank: #81-105
    Groton School
    (Episcopal)
    11

    Grades: 8-12
    282 Farmers Row, Box 991
    GrotonMA 01450
    (978)448-7510
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12, PG
    PO Box 257, 1614 Main St., Rte. 17
    Kents HillME 04349
    (207)685-1606
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12, PG
    64 Main Street
    MeridenNH 03770
    (603)469-2100
  • 81.-105.Rank: #81-105
    The Kiski School
    The Kiski School Photo - Kiski's Science, Technology, Engineering, Arts, and Math (STEAM) class.
    All-Boys 
    11

    Grades: 9-12, PG
    1888 Brett Lane
    SaltsburgPA 15681
    (724)639-8035
  • 81.-105.Rank: #81-105
    11

    Grades: 6-12, PG
    66 School Street
    GranbyMA 01033
    (413)255-0000
  • 81.-105.Rank: #81-105
    11

    Grades: 7-12, PG
    320 Iwo Jima Blvd
    HarlingenTX 78550
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12, PG
    100 Academy Drive
    MercersburgPA 17236
    (717)328-6173
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12, PG
    45 Waterloo Street South
    Stratford, ONCanada L0R1B
    (519)272-1900
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12, PG
    70 Main Street
    New HamptonNH 03256
    (603)677-3401
  • 81.-105.Rank: #81-105
    11

    Grades: 8-12 | Pre-K-12 (day)
    4254 Colonial Avenue
    RoanokeVA 24018
    (540)989-6641
  • 81.-105.Rank: #81-105
    11

    Grades: 9-12, PG
    One Lamplighter Way
    Mount HermonMA 01354
    (413)498-3227
  • 81.-105.Rank: #81-105
    11

    Grades: 6-12, PG
    200 Seminary Street
    PennsburgPA 18073
    (215)679-9511
  • 81.-105.Rank: #81-105
    11

    Grades: 6-12, PG | K-12, PG (day)
    18 Goodfriend Drive
    East HamptonNY 11937
    (631)907-5400
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