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 108 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.
    10
    Grades: 9-12, PG
    Suffield Academy
    SuffieldCT 06078
    (860)386-4440
  • 3.-7.
    11
    Grades: 9-12
    1200 N. Quaker Lane
    AlexandriaVA 22302
    (877)933-4347
  • 3.-7.
    11

    Grades: 9-12
    1 Elm Street
    ByfieldMA 01922
    (978)499-3120
  • 3.-7.
    11

    Grades: 8-12 | Pre-K-12 (day)
    4254 Colonial Avenue
    RoanokeVA 24018
    (540)989-6641
  • 3.-7.
    11

    Grades: 9-12, PG
    One Lamplighter Way
    Mount HermonMA 01354
    (413)498-3227
  • 3.-7.
    11

    Grades: 9-12, PG
    110 Woodbury Road
    WatertownCT 06795
    (860)945-7700
  • 8.-30.
    12
    Grades: 9-12, PG
    500 Old Farms Road
    AvonCT 06001
    (800)464-2866
  • 8.-30.
    12

    Grades: 9-12, PG
    245 North Undermountain Road
    SheffieldMA 01257
    (413)229-1003
  • 8.-30.
    12

    Grades: 9-12, PG
    PO Box 600
    BlairstownNJ 07825
    (908)362-6121
  • 8.-30.
    12

    Grades: 9-12, PG
    333 Christian Street
    WallingfordCT 06492
    (203)697-2239
  • 8.-30.
    Dana Hall School
    Dana Hall School Photo - At Dana Hall, a dorm is not just a place to sleep -- it's a home away from home, a personal space in a larger community, and the springboard for life skills and confidence that Dana students gain as they develop independence.
    All-Girls 
    12

    Grades: 9-12
    45 Dana Road
    WellesleyMA 02482
    (781)489-1331
  • 8.-30.
    12

    Grades: 9-12, PG
    7 Boyden Lane
    DeerfieldMA 01342
    (413)774-1400
  • 8.-30.
    12

    Grades: 9-12, PG
    975 West Main Street
    Dover FoxcroftME 04426
    (207)564-8664
  • 8.-30.
    12

    Grades: 9-12, PG
    860 Beech Street
    PottstownPA 19464
    (610)326-1000
  • 8.-30.
    12

    Grades: 9-12, PG
    11 Interlaken Road
    LakevilleCT 06039
    (860)435-3102
  • 8.-30.
    Kent School
    Kent School Photo - Located in the foothills of the Berkshire mountains, Kent was voted the best fall foliage destination by Yankee Magazine.
    (Episcopal)
    12

    Grades: 9-12, PG
    PO Box 2006
    KentCT 06757
    (860)927-6111
  • 8.-30.
    12

    Grades: 9-12, PG
    1500 West Kennedy Road
    Lake ForestIL 60045
    (847)615-3267
  • 8.-30.
    12

    Grades: 9-12, PG
    2500 Main Street
    LawrencevilleNJ 08648
    (800)735-2030
  • 8.-30.
    12

    Grades: 9-12, PG
    Office of Admission
    WindsorCT 06095
    (860)687-6400
  • 8.-30.
    12

    Grades: 9-12
    PO Box 127, 168 Institute Circle
    Lyndon CenterVT 05850
    (802)535-3700
  • 8.-30.
    12

    Grades: 9-12, PG
    295 Main Street
    PittsfieldME 04967
    (207)487-2282
  • 8.-30.
    12

    Grades: 9-12, PG
    300 East Seminary Street
    MercersburgPA 17236
    (717)328-6173
  • 8.-30.
    12

    Grades: 9-12
    1400 Lowell Road
    ConcordMA 01742
    (978)371-6524
  • 8.-30.
    12

    Grades: 9-12, PG
    201 South Main Street
    HightstownNJ 08520
    (609)944-7501
  • 8.-30.
    12

    Grades: 9-12, PG
    20 Main Street
    ExeterNH 03833
    (603)777-3437
  • 8.-30.
    12

    Grades: 7-12
    2001 Riverside Drive
    GainesvilleGA 30501
    (800)462-2338
  • 8.-30.
    12

    Grades: 9-12, PG
    1000 Main Street, PO Box 906
    St. JohnsburyVT 05819
    (802)751-2130
  • 8.-30.
    12

    Grades: 9-12, PG
    1000 Shumway Avenue
    FaribaultMN 55021
    (507)333-1618
  • 8.-30.
    12

    Grades: 9-12
    66 Spring Street
    MarionMA 02738
    (508)291-8300
  • 31.-39.
    13
    Grades: 9-12, PG | 6-12, PG (day)
    176 Edgerstoune Road
    PrincetonNJ 08540
    (609)921-7600
  • 31.-39.
    13

    Grades: 7-12 | 5-12 (day)
    60 Knox Lane
    WheelingWV 26003
    (304)233-1436
  • 31.-39.
    The Pennington School
    (United Methodist)
    13

    Grades: 8-12 | 6-12 (day)
    112 West Delaware Avenue
    PenningtonNJ 08534
    (609)737-6128
  • 31.-39.
    13

    Grades: 9-12, PG
    180 Main Street
    AndoverMA 01810
    (978)749-4050
  • 31.-39.
    13

    Grades: 7-12 | Pre-K-12 (day)
    339 Nacoochee Drive
    Rabun GapGA 30568
    (706)746-7720
  • 31.-39.
    13

    Grades: 9-12
    2132 Ivy Road
    CharlottesvilleVA 22903
    (434)296-5106
  • 31.-39.
    13

    Grades: 6-12, PG | Pre-K-12, PG (day)
    Via Collina d'Oro
    MontagnolaSwitzerland 6926
    41919605151
  • 31.-39.
    13

    Grades: 9-12, PG | 7-12, PG (day)
    19 Payson Avenue
    EasthamptonMA 01027
    (413)529-3241
  • 31.-39.
    13

    Grades: 9-12, PG | 6-12, PG (day)
    81 Providence Street
    WorcesterMA 01604
    (508)459-5481
  • 40.-48.
    14
    Grades: 9-12 | 6-12 (day)
    171 Baylor School Road
    ChattanoogaTN 37405
    (423)267-5902
  • 40.-48.
    14

    Grades: 9-12
    1300 Academy Road
    CulverIN 46511
    (574)842-7100
  • 40.-48.
    14

    Grades: 7-9 | K-9 (day)
    48 Main Street
    SouthboroughMA 01772
    (508)490-8201
  • 40.-48.
    George School
    George School Photo - A typical Fall scene around campus
    (Society of Friends)
    14

    Grades: 9-12
    1690 Newtown Langhorne Road
    NewtownPA 18940
    (215)579-6547
  • 40.-48.
    14

    Grades: 9-12 | 5-12 (day)
    49 Clinton Avenue
    Dobbs FerryNY 10522
    (914)479-6420
  • 40.-48.
    McCallie School
    McCallie School Photo - Current students and alumni will tell you that a single-sex academic environment makes classes at McCallie more dynamic, honest, and productive.
    All-Boys 
    14

    Grades: 9-12 | 6-12 (day)
    500 Dodds Avenue
    ChattanoogaTN 37404
    (800)234-2163
  • 40.-48.
    14

    Grades: 9-12 | K-12 (day)
    170 Centre Street
    MiltonMA 02186
    (617)898-2227
  • 40.-48.
    14

    Grades: 9-12 | Pre-K-12 (day)
    3152 Forest Lake Road
    Pebble BeachCA 93953
    (831)625-8309
  • 40.-48.
    Wyoming Seminary Upper School
    Wyoming Seminary Upper School Photo - The Louis Maslow Stem School at Wyoming Seminary creates real world opportunities to study robotics, engineering and environmental issues.
    (United Methodist)
    14

    Grades: 9-12, PG
    201 North Sprague Ave.
    KingstonPA 18704
    (570)270-2160
  • 49.-67.
    15
    Grades: 9-12 | 6-12 (day)
    2100 Mt. Diablo Scenic Blvd.
    DanvilleCA 94506
    (925)362-7223
  • 49.-67.
    15

    Grades: 9-12, PG | Pre-K-12, PG (day)
    7400 San Jose Blvd.
    JacksonvilleFL 32217
    (904)256-5030
  • 49.-67.
    15

    Grades: 8-12 | Pre-K-12 (day)
    1051 N Houston
    BullardTX 75757
    (903)894-5000
  • 49.-67.
    15

    Grades: 9-12, PG
    68 New Dover Road
    CanterburyUnited Kingdom CT1 3LQ
    01227866540
  • 49.-67.
    15

    Grades: 9-12, PG | Pre-K-12, PG (day)
    1014 Cave Spring Road, SW
    RomeGA 30161
    (706)235-6051
  • 49.-67.
    15

    Grades: 9-12
    582 Columbus Avenue
    ThornwoodNY 10594
    (914)495-6028
  • 49.-67.
    15

    Grades: 9-12, PG
    745 Main Street
    FryeburgME 04037
    (207)935-2013
  • 49.-67.
    15

    Grades: 8-12 | Pre-K-12 (day)
    11600 Welch Road
    DallasTX 75229
    (214)360-6526
  • 49.-67.
    15

    Grades: 5-12, PG
    5500 34th Street West
    BradentonFL 34210
    (800)872-6425
  • 49.-67.
    The King's Academy
    The King's Academy Photo - Build friendships that can last a lifetime!
    (Christian)
    15

    Grades: 6-12, PG | Pre-K-12, PG (day)
    202 Smothers Road
    SeymourTN 37865
    (865)573-8321
  • 49.-67.
    15

    Grades: 9-12, PG
    101 West College Blvd
    RoswellNM 88201
    (800)421-5376
  • 49.-67.
    15

    Grades: 9-12
    3900 Jog Road
    Boca RatonFL 33434
    (561)210-2020
  • 49.-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
  • 49.-67.
    15

    Grades: 9-12 | K-12 (day)
    1500 Butterfield Road
    San AnselmoCA 94960
    (415)258-1905
  • 49.-67.
    15

    Grades: 9-12 | Pre-K-12 (day)
    16923 Norwood Road
    Sandy SpringMD 20860
    (301)774-7455
  • 49.-67.
    15

    Grades: 9-12
    423 Fox Chapel Road
    PittsburghPA 15238
    (412)968-3180
  • 49.-67.
    15

    Grades: 7-12 | 5-12 (day)
    201 Campus Drive, PO Box 10
    Tallulah FallsGA 30573
    (706)754-0400
  • 49.-67.
    15

    Grades: 9-12 | 5-12 (day)
    55 Deblaquire St N.
    Port HopeCanada L1A4K
    (905)885-3217
  • 49.-67.
    15

    Grades: 8-12, PG | 6-12, PG (day)
    423 Main Street
    WilbrahamMA 01095
    (413)596-9107
  • 68.-108.
    'Iolani School
    'Iolani School Photo
    (Episcopal)
    >15
    Grades: 9-12 | K-12 (day)
    563 Kamoku Street
    HonoluluHI 96826
    (808)943-2279
  • 68.-108.
    >15

    Grades: 9-12, PG
    2735 Mt. Baker Road
    Mill Bay, BC V0R 2P1Canada 1
    (250)743-5521
  • 68.-108.
    >15

    Grades: 9-12 | Pre-K-12 (day)
    PO Box 801 39221 Woodward Ave.
    Bloomfield HillsMI 48303
    (248)645-3610
  • 68.-108.
    Georgetown Preparatory School
    Georgetown Preparatory School Photo - 100% of the class of 2013 will be studying in four year colleges or universities. Top placements over the last three years are Georgetown, Notre Dame, UVA, Boston College, University of Pennsylvania, and Duke. Students in the class of 2013 will also matriculate to Yale, Cornell, Stanford, Harvard, and NYU
    All-Boys  (Catholic)
    >15

    Grades: 9-12
    10900 Rockville Pike
    North BethesdaMD 20852
    (301)214-1215
  • 68.-108.
    >15

    Grades: 7-12 | K-8 (day)
    No.11, Anfu Street, Houshayu, Shunyi District
    BeijingChina 101318
    8610804960082028
  • 68.-108.
    >15

    Grades: 9-12 | 6-12 (day)
    1415 Summit Avenue
    SeattleWA 98122
    (206)682-7309
  • 68.-108.
    >15

    Grades: 9-12
    3535 Commerce Rd.
    Orchard LakeMI 48324
    (248)431-1697
  • 68.-108.
    >15

    Grades: 9-12, PG | Pre-K-12, PG (day)
    6300 SW Nicol Road
    PortlandOR 97223
    (503)768-3115
  • 68.-108.
    >15

    Grades: 5-12, PG | Pre-K-12, PG (day)
    2 Ridley Road
    St CatharinesCanada l2r 7c3
    (905)684-1889
  • 68.-108.
    >15

    Grades: 8-12
    1975 Renfrew Road
    Shawnigan Lake, BCCanada V0R2W1
    (250)743-6207
  • 68.-108.
    >15

    Grades: 7-12 | Pre-K-12 (day)
    1305 Whittington Drive
    HoustonTX 77077
    (847)840-3064
  • 68.-108.
    >15

    Grades: 9-12
    1175 West Baseline Road
    ClaremontCA 91711
    (909)482-5214
  • 68.-108.
    >15

    Grades: 9-12 | 4-12 (day)
    362 Mariposa Avenue
    OttawaCanada K1M0T3
    (613)749-9630
  • 68.-108.
    >15

    Grades: 6-12
    425 South Lindbergh Blvd.
    St. LouisMO 63131
    (314)692-6640
  • 68.-108.
    >15

    Grades: 8-12 | Pre-K-12 (day)
    8401 Belvedere Rd
    West Palm BeachFL 33411
    (561)657-3470
  • 68.-108.
    >15

    Grades: 9-12
    2 School Way
    WatsonvilleCA 95076
    (831)768-6137
  • 68.-108.
    >15

    Grades: 8-12 | K-12 (day)
    3400 Richmond Road
    VictoriaCanada V8P 4P5
    (250)370-6170
  • 68.-108.
    >15

    Grades: 8-12 | 6-12 (day)
    6500 St. Stephen's Drive
    AustinTX 78746
    (512)327-1213
  • 68.-108.
    Branksome Hall
    Branksome Hall Photo
    All-Girls 
    >15

    Grades: 7-12 | Pre-K-12 (day)
    10 Elm Avenue
    TorontoCanada 00000
    (416)920-9741
  • 68.-108.
    >15

    Grades: 9-12
    7600 Lyons Road
    Coconut CreekFL 33073
    (954)305-6937
  • 68.-108.
    >15

    Grades: 6-12
    438 Main Street
    SacoME 04072
    (207)282-5383
  • 68.-108.
    >15

    Grades: 9-12
    6189 Winter Garden-Vineland Rd
    WindermereFL 34786
    (954)305-6937
  • 68.-108.
    >15

    Grades: 9-12
    811 W. Donovan Street
    HoustonTX 77091
    (312)416-1955
  • 68.-108.
    >15

    Grades: 9-12, PG
    330 N. Glenview Avenue
    Milwaukee WI 53213
    (414)453-4567
  • 68.-108.
    >15

    Grades: 9-12
    3701 Sinclair Lane
    BaltimoreMD 21213
    (312)416-1955
  • 68.-108.
    >15

    Grades: 9-12
    4026 Maher St.
    NapaCA 94558
    (312)416-1955
  • 68.-108.
    >15

    Grades: 8-12
    955 Harbourside Drive
    North Vancouver, BCCanada V7P 3S4
    (604)998-1000
  • 68.-108.
    >15

    Grades: 6-12 | Pre-K-12 (day)
    234 Global edu-ro, Daejeong-eup, Seogwipo-si
    Jeju-doSouth Korea 63644
    82649025073
  • 68.-108.
    >15

    Grades: 7-12, PG | Pre-K-12, PG (day)
    17235 Seventh Street
    MontverdeFL 34756
    (407)469-2561
  • 68.-108.
    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
    (651)455-1521
  • 68.-108.
    St. Francis High School
    St. Francis High School Photo - Student room
    All-Boys  (Catholic)
    >15

    Grades: 9-12
    4129 Lake Shore Road
    HamburgNY 14075
    (716)627-1200
  • 68.-108.
    >15

    Grades: 8-12 | 1-12 (day)
    4175 West 29th Avenue
    Vancouver, BCCanada 00001
    (604)221-3915
  • 68.-108.
    >15

    Grades: 9-12
    550 S. Albert St.
    Saint PaulMN 55116
    (312)416-1955
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