Smallest Average Class Size

All Schools
All Schools 
400+ students
400+ students 
200-400 students
200-400 students 
< 200 students
< 200 students 
More
  • Among "Schools with 400+ Students", view the boarding schools with the smallest average class sizes (2018-19).
  • 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 (2018-19)

Among Schools with 400+ Students (out of 107 schools)

Sorted by range (alphabetically within range)
  • Boarding School # Students Grades Location
  • 1.
    8
    Grades: 9-12 | 2-12 (day)
    P.O. Box 227
    Prides CrossingMA 01965
    978-236-3000
  • 2.
    9
    Grades: 9-12, PG
    10 Main Street
    CheshireCT 06410
    2034397250
  • 3.
    10
    Grades: 9-12, PG
    Suffield Academy
    SuffieldCT 06078
    860-386-4440
  • 4.-9.
    11
    Grades: 9-12, PG
    245 North Undermountain Road
    SheffieldMA 01257
    413-229-1003
  • 4.-9.
    11

    Grades: 9-12
    1200 N. Quaker Lane
    AlexandriaVA 22302
    877-933-4347
  • 4.-9.
    11

    Grades: 9-12
    1 Elm Street
    ByfieldMA 01922
    978-499-3120
  • 4.-9.
    11

    Grades: 8-12 | Pre-K-12 (day)
    4254 Colonial Avenue
    RoanokeVA 24018
    5409896641
  • 4.-9.
    11

    Grades: 9-12, PG
    One Lamplighter Way
    Mount HermonMA 01354
    413-498-3227
  • 4.-9.
    11

    Grades: 9-12, PG
    110 Woodbury Road
    WatertownCT 06795
    860-945-7700
  • 10.-32.
    12
    Grades: 9-12, PG
    500 Old Farms Road
    AvonCT 06001
    800-464-2866
Sorted by range (alphabetically within range)
  • Boarding School # Students Grades Location
  • 11.-32.
    12
    Grades: 9-12, PG
    PO Box 600
    BlairstownNJ 07825
    908-362-6121
  • 11.-32.
    12

    Grades: 9-12, PG
    333 Christian Street
    WallingfordCT 06492
    203-697-2239
  • 11.-32.
    Dana Hall School
    Dana Hall School Photo - The Dana Hall Upper School offers intellectual challenge and personal growth to a diverse community of girls from dozens of towns around New England and every corner of the U.S.and the world.
    All-Girls 
    12

    Grades: 9-12
    45 Dana Road
    WellesleyMA 02482
    781-489-1331
  • 11.-32.
    12

    Grades: 9-12, PG
    7 Boyden Lane
    DeerfieldMA 01342
    413-774-1400
  • 11.-32.
    12

    Grades: 9-12, PG
    975 West Main Street
    Dover FoxcroftME 04426
    207-564-8664
  • 11.-32.
    12

    Grades: 9-12, PG
    860 Beech Street
    PottstownPA 19464
    610-326-1000
  • 11.-32.
    12

    Grades: 9-12, PG
    11 Interlaken Road
    LakevilleCT 06039
    860-435-3102
  • 11.-32.
    12

    Grades: 5-12, PG | Pre-K-12, PG (day)
    5500 34th Street West
    BradentonFL 34210
    1-800-872-6425
  • 11.-32.
    Kent School
    Kent School Photo - Kent's newly renovated art studios offer ample space to explore your creativity.
    (Episcopal)
    12

    Grades: 9-12, PG
    PO Box 2006
    KentCT 06757
    860-927-6111
  • 11.-32.
    12

    Grades: 9-12, PG
    1500 West Kennedy Road
    Lake ForestIL 60045
    847-615-3267
  • 11.-32.
    12

    Grades: 9-12, PG
    2500 Main Street
    LawrencevilleNJ 08648
    8007352030
  • 11.-32.
    12

    Grades: 9-12, PG
    Office of Admission
    WindsorCT 06095
    860-687-6400
  • 11.-32.
    12

    Grades: 9-12
    PO Box 127, 168 Institute Circle
    Lyndon CenterVT 05850
    802-535-3700
  • 11.-32.
    12

    Grades: 9-12, PG
    295 Main Street
    PittsfieldME 04967
    207-487-2282
  • 11.-32.
    12

    Grades: 9-12, PG
    300 East Seminary Street
    MercersburgPA 17236
    717-328-6173
  • 11.-32.
    12

    Grades: 9-12
    1400 Lowell Road
    ConcordMA 01742
    978-371-6524
  • 11.-32.
    12

    Grades: 9-12, PG
    201 South Main Street
    HightstownNJ 08520
    609-944-7501
  • 11.-32.
    12

    Grades: 9-12, PG
    20 Main Street
    ExeterNH 03833
    603-777-3437
  • 11.-32.
    12

    Grades: 7-12
    2001 Riverside Drive
    GainesvilleGA 30501
    1-800-462-2338
  • 11.-32.
    12

    Grades: 9-12, PG
    1000 Main Street, PO Box 906
    St. JohnsburyVT 05819
    802-751-2130
  • 11.-32.
    12

    Grades: 9-12, PG
    1000 Shumway Avenue
    FaribaultMN 55021
    507-333-1618
  • 11.-32.
    12

    Grades: 9-12
    66 Spring Street
    MarionMA 02738
    508-291-8300
  • 33.-42.
    13
    Grades: 9-12
    1300 Academy Road
    CulverIN 46511
    574-842-7100
  • 33.-42.
    13

    Grades: 9-12, PG | 6-12, PG (day)
    176 Edgerstoune Road
    PrincetonNJ 08540
    609-921-7600
  • 33.-42.
    13

    Grades: 7-12 | 5-12 (day)
    60 Knox Lane
    WheelingWV 26003
    304-233-1436
  • 33.-42.
    The Pennington School
    (United Methodist)
    13

    Grades: 8-12 | 6-12 (day)
    112 West Delaware Avenue
    PenningtonNJ 08534
    609-737-6128
  • 33.-42.
    13

    Grades: 9-12, PG
    180 Main Street
    AndoverMA 01810
    978-749-4050
  • 33.-42.
    13

    Grades: 7-12 | Pre-K-12 (day)
    339 Nacoochee Drive
    Rabun GapGA 30568
    706-746-7720
  • 33.-42.
    13

    Grades: 9-12
    2132 Ivy Road
    CharlottesvilleVA 22903
    434-296-5106
  • 33.-42.
    13

    Grades: 6-12, PG | Pre-K-12, PG (day)
    Via Collina d'Oro
    MontagnolaSwitzerland 6926
    41919605151
  • 33.-42.
    13

    Grades: 9-12, PG | 7-12, PG (day)
    19 Payson Avenue
    EasthamptonMA 01027
    (413) 529-3241
  • 33.-42.
    13

    Grades: 9-12, PG | 6-12, PG (day)
    81 Providence Street
    WorcesterMA 01604
    508-459-5481
  • 43.-50.
    14
    Grades: 9-12 | 6-12 (day)
    171 Baylor School Road
    ChattanoogaTN 37405
    423-267-5902
  • 43.-50.
    14

    Grades: 7-9 | K-9 (day)
    48 Main Street
    SouthboroughMA 01772
    5084908201
  • 43.-50.
    George School
    George School Photo - This clock sits in Red Square in the middle of Campus and helps students get to class on time!
    (Society of Friends)
    14

    Grades: 9-12
    1690 Newtown Langhorne Road
    NewtownPA 18940
    215-579-6547
  • 43.-50.
    14

    Grades: 9-12
    49 Clinton Avenue
    Dobbs FerryNY 10522
    914-479-6420
  • 43.-50.
    McCallie School
    McCallie School Photo - McCallie believes that its ongoing Christian tradition builds a strong moral foundation and a sense of civic and social duty. By instilling a respect for, and understanding of, other religions and faiths, McCallie supports the spiritual growth of all its students.
    All-Boys 
    14

    Grades: 9-12 | 6-12 (day)
    500 Dodds Avenue
    ChattanoogaTN 37404
    1-800-234-2163
  • 43.-50.
    14

    Grades: 9-12 | K-12 (day)
    170 Centre Street
    MiltonMA 02186
    617-898-2227
  • 43.-50.
    14

    Grades: 9-12 | Pre-K-12 (day)
    3152 Forest Lake Road
    Pebble BeachCA 93953
    831-625-8309
  • 43.-50.
    Wyoming Seminary Upper School
    Wyoming Seminary Upper School Photo - Athletics at Wyoming Seminary are competitive. Sem offers several choices to student-athletes every season, and over 75% of Sem students participate in our athletic programs.
    (United Methodist)
    14

    Grades: 9-12, PG
    201 North Sprague Ave.
    KingstonPA 18704
    570-270-2160
  • 51.-67.
    15
    Grades: 9-12 | 6-12 (day)
    2100 Mt. Diablo Scenic Blvd.
    DanvilleCA 94506
    9253627223
  • 51.-67.
    15

    Grades: 7-12, PG | Pre-K-12, PG (day)
    7400 San Jose Blvd.
    JacksonvilleFL 32217
    9042565030
  • 51.-67.
    15

    Grades: 8-12, PG | Pre-K-12, PG (day)
    1051 N Houston
    BullardTX 75757
    903-894-5000
  • 51.-67.
    15

    Grades: 9-12, PG | Pre-K-12, PG (day)
    1014 Cave Spring Road, SW
    RomeGA 30161
    706-235-6051
  • 51.-67.
    15

    Grades: 9-12, PG
    745 Main Street
    FryeburgME 04037
    207-935-2013
  • 51.-67.
    15

    Grades: 8-12 | Pre-K-12 (day)
    11600 Welch Road
    DallasTX 75229
    214-360-6526
  • 51.-67.
    The King's Academy
    The King's Academy Photo - TKA offers a wide variety of competitive athletics.
    (Christian)
    15

    Grades: 7-12, PG | Pre-K-12, PG (day)
    202 Smothers Road
    SeymourTN 37865
    865-573-8321
  • 51.-67.
    15

    Grades: 7-12, PG | Pre-K-12, PG (day)
    17235 Seventh Street
    MontverdeFL 34756
    407-469-2561
  • 51.-67.
    15

    Grades: 9-12, PG
    101 West College Blvd
    RoswellNM 88201
    800-421-5376
  • 51.-67.
    15

    Grades: 9-12
    3900 Jog Road
    Boca RatonFL 33434
    561-210-2020
  • 51.-67.
    St. Paul's School
    St. Paul's School Photo - SPS 1
    (Episcopal)
    15

    Grades: 9-12
    325 Pleasant Street
    ConcordNH 03301
    603-229-4700
  • 51.-67.
    15

    Grades: 9-12 | K-12 (day)
    1500 Butterfield Road
    San AnselmoCA 94960
    415-258-1905
  • 51.-67.
    15

    Grades: 9-12 | Pre-K-12 (day)
    16923 Norwood Road
    Sandy SpringMD 20860
    301-774-7455
  • 51.-67.
    15

    Grades: 9-12
    423 Fox Chapel Road
    PittsburghPA 15238
    412-968-3180
  • 51.-67.
    15

    Grades: 7-12 | 5-12 (day)
    201 Campus Drive, PO Box 10
    Tallulah FallsGA 30573
    706-754-0400
  • 51.-67.
    15

    Grades: 9-12 | 5-12 (day)
    55 Deblaquire St N.
    Port HopeCanada L1A4K
    19058853217
  • 51.-67.
    15

    Grades: 8-12, PG | 6-12, PG (day)
    423 Main Street
    WilbrahamMA 01095
    413-596-9107
  • 68.-107.
    'Iolani School
    'Iolani School Photo
    (Episcopal)
    >15
    Grades: 9-12 | K-12 (day)
    563 Kamoku Street
    HonoluluHI 96826
    808-943-2279
  • 68.-107.
    >15

    Grades: 9-12, PG
    2735 Mt. Baker Road
    Mill Bay, BC V0R 2P1Canada 1
    1-250-743-5521
  • 68.-107.
    >15

    Grades: 9-12
    PO Box 801 39221 Woodward Ave.
    Bloomfield HillsMI 48303
    2486453610
  • 68.-107.
    Georgetown Preparatory School
    Georgetown Preparatory School Photo - GP has a world class lacrosse program
    All-Boys  (Catholic)
    >15

    Grades: 9-12
    10900 Rockville Pike
    North BethesdaMD 20852
    301-214-1215
  • 68.-107.
    >15

    Grades: 7-12 | K-8 (day)
    No.11, Anfu Street, Houshayu, Shunyi District
    BeijingChina 101318
    +86 10 80496008-2028
  • 68.-107.
    >15

    Grades: 9-12 | 6-12 (day)
    1415 Summit Avenue
    SeattleWA 98122
    206-682-7309
  • 68.-107.
    >15

    Grades: 9-12
    3535 Commerce Rd.
    Orchard LakeMI 48324
    2484311697
  • 68.-107.
    >15

    Grades: 9-12, PG | Pre-K-12, PG (day)
    6300 SW Nicol Road
    PortlandOR 97223
    503-768-3115
  • 68.-107.
    >15

    Grades: 5-12, PG | Pre-K-12, PG (day)
    2 Ridley Road
    St CatharinesCanada l2r 7c3
    905-684-1889
  • 68.-107.
    >15

    Grades: 8-12
    1975 Renfrew Road
    Shawnigan Lake, BCCanada V0R2W1
    250-743-6207
  • 68.-107.
    TMI Episcopal
    TMI Episcopal Photo - All Saints Chapel. TMI welcomes those from other spiritual traditions and celebrates our religious diversity as we journey together and on a path of spiritual and moral growth.
    (Episcopal)
    >15

    Grades: 9-12
    20955 West Tejas Trail
    San AntonioTX 78257
    2106987171
  • 68.-107.
    >15

    Grades: 7-12 | Pre-K-12 (day)
    1305 Whittington Drive
    HoustonTX 77077
    847-840-3064
  • 68.-107.
    >15

    Grades: 9-12
    1175 West Baseline Road
    ClaremontCA 91711
    909-482-5214
  • 68.-107.
    >15

    Grades: 9-12 | 4-12 (day)
    362 Mariposa Avenue
    OttawaCanada K1M0T3
    613-749-9630
  • 68.-107.
    >15

    Grades: 6-12
    425 South Lindbergh Blvd.
    St. LouisMO 63131
    314-692-6640
  • 68.-107.
    >15

    Grades: 9-12
    582 Columbus Avenue
    ThornwoodNY 10594
    9144956028
  • 68.-107.
    >15

    Grades: 8-12 | Pre-K-12 (day)
    8401 Belvedere Rd
    West Palm BeachFL 33411
    561-657-3470
  • 68.-107.
    >15

    Grades: 9-12
    2 School Way
    WatsonvilleCA 95076
    831-768-6137
  • 68.-107.
    >15

    Grades: 8-12 | 6-12 (day)
    6500 St. Stephen's Drive
    AustinTX 78746
    512-327-1213
  • 68.-107.
    >15

    Grades: 9-12, PG
    57 Academy Rd.Woodstock, CT 06281
    WoodstockCT 06281
    860-928-6575
  • 68.-107.
    Branksome Hall
    Branksome Hall Photo
    All-Girls 
    >15

    Grades: 7-12 | Pre-K-12 (day)
    10 Elm Avenue
    TorontoCanada 00000
    416-920-9741
  • 68.-107.
    Flintridge Sacred Heart Academy
    Flintridge Sacred Heart Academy Photo
    All-Girls  (Catholic)
    >15

    Grades: 9-12
    440 St. Katherine Dr.
    La Canada FlintridgeCA 91011
    626-685-8521
  • 68.-107.
    >15

    Grades: 9-12
    1 Morris Street
    New YorkNY 10004
    212-232-0266
  • 68.-107.
    >15

    Grades: 9-12
    7600 Lyons Road
    Coconut CreekFL 33073
    954-305-6937
  • 68.-107.
    >15

    Grades: 8-12 | K-12 (day)
    3400 Richmond Road
    VictoriaCanada V8P 4P5
    (250) 370-6170
  • 68.-107.
    >15

    Grades: 6-12
    438 Main Street
    SacoME 04072
    207-282-5383
  • 68.-107.
    >15

    Grades: 9-12
    6189 Winter Garden-Vineland Rd
    WindermereFL 34786
    954-305-6937
  • 68.-107.
    >15

    Grades: 9-12, PG
    330 N. Glenview Avenue
    Milwaukee WI 53213
    4144534567
  • 68.-107.
    >15

    Grades: 9-12
    3701 Sinclair Lane
    BaltimoreMD 21213
    312-496-5533
  • 68.-107.
    >15

    Grades: 9-12
    4026 Maher St.
    NapaCA 94558
    312-496-5533
  • 68.-107.
    >15

    Grades: 8-12
    955 Harbourside Drive
    North Vancouver, BCCanada V7P 3S4
    1-604-998-1000
  • 68.-107.
    >15

    Grades: 6-12 | Pre-K-12 (day)
    234 Global edu-ro, Daejeong-eup, Seogwipo-si
    Jeju-doSouth Korea 63644
    82-64-902-5073
  • 68.-107.
    St. Croix Academy
    St. Croix Academy Photo - St. Croix's lakeside family-style dormitory was built in 2015 and is located on a beautiful lake with walkways to the Mississippi River and within walking distance of over 50 shops and restaurants.
    (Christian)
    >15

    Grades: 6-12
    1200 Oakdale Ave.
    St. PaulMN 55118
    6514551521
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