Smallest Average Class Size
- Among "Schools with 400+ Students", view the boarding schools with the smallest average class sizes (2019-20).
- 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 (2019-20)
Among Schools with 400+ Students (out of 110 schools)
Sorted by range (alphabetically within range)
- Boarding School # Students Grades Location
- 1.Rank: #1 8
Grades: 9-12 | 2-12 (day)P.O. Box 227
Prides Crossing, MA 01965
(978)236-3000 - 2.Rank: #2 9
Grades: 9-12, PGSuffield Academy
Suffield, CT 06078
(860)386-4440 - 3.-9.Rank: #3-9 11
Grades: 9-12, PG500 Old Farms Road
Avon, CT 06001
(800)464-2866 - 3.-9.Rank: #3-911
Grades: 9-121200 N. Quaker Lane
Alexandria, VA 22302
(877)933-4347 - 3.-9.Rank: #3-911
Grades: 9-121 Elm Street
Byfield, MA 01922
(978)499-3120 - 3.-9.Rank: #3-911
Grades: 9-12, PG100 Academy Drive
Mercersburg, PA 17236
(717)328-6173 - 3.-9.Rank: #3-911
Grades: 8-12 | Pre-K-12 (day) 4254 Colonial Avenue
Roanoke, VA 24018
(540)989-6641 - 3.-9.Rank: #3-911
Grades: 9-12, PGOne Lamplighter Way
Mount Hermon, MA 01354
(413)498-3227 - 3.-9.Rank: #3-911
Grades: 9-12, PG110 Woodbury Road
Watertown, CT 06795
(860)945-7700 - 10.-31.Rank: #10-31 12
Grades: 9-12, PG245 North Undermountain Road
Sheffield, MA 01257
(413)229-1003 - 10.-31.Rank: #10-3112
Grades: 9-12, PGPO Box 600
Blairstown, NJ 07825
(908)362-6121 - 10.-31.Rank: #10-3112
Grades: 9-12, PG333 Christian Street
Wallingford, CT 06492
(203)697-2239 - 10.-31.Rank: #10-3112
Grades: 9-12 | 5-12 (day)45 Dana Road
Wellesley, MA 02482
(781)489-1331 - 10.-31.Rank: #10-3112
Grades: 9-12, PG7 Boyden Lane
Deerfield, MA 01342
(413)774-1400 - 10.-31.Rank: #10-3112
Grades: 9-12, PG975 West Main Street
Dover Foxcroft, ME 04426
(207)564-8664 - 10.-31.Rank: #10-3112
Grades: 9-12, PG860 Beech Street
Pottstown, PA 19464
(610)326-1000 - 10.-31.Rank: #10-3112
Grades: 9-12, PG11 Interlaken Road
Lakeville, CT 06039
(860)435-3102 - 10.-31.Rank: #10-3112
Grades: 9-12, PGPO Box 2006
Kent, CT 06757
(860)927-6111 - 10.-31.Rank: #10-3112
Grades: 9-12, PG1500 West Kennedy Road
Lake Forest, IL 60045
(847)615-3267 - 10.-31.Rank: #10-3112
Grades: 9-12, PG2500 Main Street
Lawrenceville, NJ 08648
(800)735-2030 - 10.-31.Rank: #10-3112
Grades: 9-12, PGOffice of Admission
Windsor, CT 06095
(860)687-6400 - 10.-31.Rank: #10-3112
Grades: 9-12PO Box 127, 168 Institute Circle
Lyndon Center, VT 05850
(802)535-3700 - 10.-31.Rank: #10-3112
Grades: 9-12, PG295 Main Street
Pittsfield, ME 04967
(207)487-2282 - 10.-31.Rank: #10-3112
Grades: 9-121400 Lowell Road
Concord, MA 01742
(978)371-6524 - 10.-31.Rank: #10-3112
Grades: 9-12, PG201 South Main Street
Hightstown, NJ 08520
(609)944-7501 - 10.-31.Rank: #10-3112
Grades: 9-12, PG20 Main Street
Exeter, NH 03833
(603)777-3437 - 10.-31.Rank: #10-3112
Grades: 7-122001 Riverside Drive
Gainesville, GA 30501
(800)462-2338 - 10.-31.Rank: #10-3112
Grades: 9-12, PG1000 Main Street, PO Box 906
St. Johnsbury, VT 05819
(802)751-2130 - 10.-31.Rank: #10-3112
Grades: 9-12325 Pleasant Street
Concord, NH 03301
(603)229-4700 - 10.-31.Rank: #10-31Shattuck-St. Mary's School (Episcopal)12
Grades: 9-12, PG1000 Shumway Avenue
Faribault, MN 55021
(507)333-1618 - 10.-31.Rank: #10-3112
Grades: 9-1266 Spring Street
Marion, MA 02738
(508)291-8300 - 32.-43.Rank: #32-43 13
Grades: 9-12582 Columbus Avenue
Thornwood, NY 10594
(914)495-6028 - 32.-43.Rank: #32-4313
Grades: 9-12, PG | 6-12, PG (day)176 Edgerstoune Road
Princeton, NJ 08540
(609)921-7600 - 32.-43.Rank: #32-4313
Grades: 9-12, PG4000 M 137 Hwy
Interlochen, MI 49643
(231)640-9353 - 32.-43.Rank: #32-4313
Grades: 7-12 | 5-12 (day)60 Knox Lane
Wheeling, WV 26003
(304)233-1436 - 32.-43.Rank: #32-43The Pennington School (United Methodist)13
Grades: 8-12 | 6-12 (day)112 West Delaware Avenue
Pennington, NJ 08534
(609)737-6128 - 32.-43.Rank: #32-4313
Grades: 9-12, PG180 Main Street
Andover, MA 01810
(978)749-4050 - 32.-43.Rank: #32-4313
Grades: 7-12 | Pre-K-12 (day)339 Nacoochee Drive
Rabun Gap, GA 30568
(706)746-7720 - 32.-43.Rank: #32-4313
Grades: 9-122132 Ivy Road
Charlottesville, VA 22903
(434)296-5106 - 32.-43.Rank: #32-4313
Grades: 9-12 | Pre-K-12 (day)1 Community School Drive
Sun Valley, ID 83353
(208)622-3955 - 32.-43.Rank: #32-4313
Grades: 6-12, PG | Pre-K-12, PG (day)Via Collina d'Oro
Montagnola, Switzerland 6926
41919605151 - 32.-43.Rank: #32-4313
Grades: 9-12, PG | 7-12, PG (day)19 Payson Avenue
Easthampton, MA 01027
(413)529-3241 - 32.-43.Rank: #32-4313
Grades: 9-12, PG | 6-12, PG (day)81 Providence Street
Worcester, MA 01604
(508)459-5481 - 44.-54.Rank: #44-54 14
Grades: 9-12 | 6-12 (day)171 Baylor School Road
Chattanooga, TN 37405
(423)267-5902 - 44.-54.Rank: #44-5414
Grades: 9-121300 Academy Road
Culver, IN 46511
(574)842-7100 - 44.-54.Rank: #44-5414
Grades: 7-9 | K-9 (day)48 Main Street
Southborough, MA 01772
(508)490-8201 - 44.-54.Rank: #44-5414
Grades: 9-121690 Newtown Langhorne Road
Newtown, PA 18940
(215)579-6547 - 44.-54.Rank: #44-5414
Grades: 9-12 | 5-12 (day)49 Clinton Avenue
Dobbs Ferry, NY 10522
(914)479-6420 - 44.-54.Rank: #44-5414
Grades: 9-12, PG | 6-12, PG (day)500 Dodds Avenue
Chattanooga, TN 37404
(800)234-2163 - 44.-54.Rank: #44-5414
Grades: 9-12 | K-12 (day)170 Centre Street
Milton, MA 02186
(617)898-2227 - 44.-54.Rank: #44-5414
Grades: 9-12 | Pre-K-12 (day)3152 Forest Lake Road
Pebble Beach, CA 93953
(831)625-8309 - 44.-54.Rank: #44-5414
Grades: 7-121 Chapman Parkway
Stony Brook, NY 11790
(631)751-1800 - 44.-54.Rank: #44-5414
Grades: 7-12 | Pre-K-12 (day)6189 Winter Garden-Vineland Rd
Windermere, FL 34786
(407)905-7737 - 44.-54.Rank: #44-5414
Grades: 9-12, PG201 North Sprague Ave.
Kingston, PA 18704
(570)270-2160 - 55.-72.Rank: #55-72 15
Grades: 9-12 | 6-12 (day)2100 Mt. Diablo Scenic Blvd.
Danville, CA 94506
(925)362-7223 - 55.-72.Rank: #55-7215
Grades: 9-12, PG | Pre-K-12, PG (day)7400 San Jose Blvd.
Jacksonville, FL 32217
(904)256-5030 - 55.-72.Rank: #55-7215
Grades: 8-12 | Pre-K-12 (day)1051 N Houston
Bullard, TX 75757
(903)894-5000 - 55.-72.Rank: #55-7215
Grades: 9-12, PG | Pre-K-12, PG (day)1014 Cave Spring Road, SW
Rome, GA 30161
(706)235-6051 - 55.-72.Rank: #55-7215
Grades: 9-12, PG745 Main Street
Fryeburg, ME 04037
(207)935-2013 - 55.-72.Rank: #55-7215
Grades: 8-12 | Pre-K-12 (day)300 Garrison Forest Road
Owings Mills, MD 21117
(410)559-3111 - 55.-72.Rank: #55-7215
Grades: 8-12 | Pre-K-12 (day)11600 Welch Road
Dallas, TX 75229
(214)360-6526 - 55.-72.Rank: #55-7215
Grades: 6-12, PG5500 34th Street West
Bradenton, FL 34210
(800)872-6425 - 55.-72.Rank: #55-7215
Grades: 6-12, PG | Pre-K-12, PG (day)202 Smothers Road
Seymour, TN 37865
(865)573-8321 - 55.-72.Rank: #55-7215
Grades: 9-12, PG101 West College Blvd
Roswell, NM 88201
(800)421-5376 - 55.-72.Rank: #55-7215
Grades: 6-12 | Pre-K-12 (day)7600 Lyons Road
Coconut Creek, FL 33073
(954)305-6937 - 55.-72.Rank: #55-7215
Grades: 9-123900 Jog Road
Boca Raton, FL 33434
(561)210-2020 - 55.-72.Rank: #55-7215
Grades: 9-12 | K-12 (day)1500 Butterfield Road
San Anselmo, CA 94960
(415)258-1905 - 55.-72.Rank: #55-7215
Grades: 9-12 | Pre-K-12 (day)16923 Norwood Road
Sandy Spring, MD 20860
(301)774-7455 - 55.-72.Rank: #55-7215
Grades: 9-12423 Fox Chapel Road
Pittsburgh, PA 15238
(412)968-3180 - 55.-72.Rank: #55-7215
Grades: 7-12 | 5-12 (day)201 Campus Drive, PO Box 10
Tallulah Falls, GA 30573
(706)754-0400 - 55.-72.Rank: #55-7215
Grades: 9-12 | 5-12 (day)55 Deblaquire St N.
Port Hope, Canada L1A4K7
(905)885-3209 - 55.-72.Rank: #55-7215
Grades: 8-12, PG | 6-12, PG (day)423 Main Street
Wilbraham, MA 01095
(413)596-9107 - 73.-110.Rank: #73-110 >15
Grades: 9-12 | K-12 (day)563 Kamoku Street
Honolulu, HI 96826
(808)943-2279 - 73.-110.Rank: #73-110>15
Grades: 9-12, PG2735 Mt. Baker Road
Mill Bay, BC V0R 2P1, Canada 1
(250)743-5521 - 73.-110.Rank: #73-110>15
Grades: 9-12 | Pre-K-12 (day)PO Box 801 39221 Woodward Ave.
Bloomfield Hills, MI 48303
(248)645-3610 - 73.-110.Rank: #73-110>15
Grades: 9-1210900 Rockville Pike
North Bethesda, MD 20852
(301)214-1215 - 73.-110.Rank: #73-110>15
Grades: 7-12 | K-8 (day)No.11, Anfu Street, Houshayu, Shunyi District
Beijing, China 101318
8610804960082028 - 73.-110.Rank: #73-110>15
Grades: 9-12 | 6-12 (day)1415 Summit Avenue
Seattle, WA 98122
(206)682-7309 - 73.-110.Rank: #73-110>15
Grades: 9-123535 Commerce Rd.
Orchard Lake, MI 48324
(248)683-0517 - 73.-110.Rank: #73-110>15
Grades: 9-12, PG | Pre-K-12, PG (day)6300 SW Nicol Road
Portland, OR 97223
(503)768-3115 - 73.-110.Rank: #73-110>15
Grades: 5-12, PG | Pre-K-12, PG (day)2 Ridley Road
St Catharines, Canada l2r 7c3
(905)684-1889 - 73.-110.Rank: #73-110>15
Grades: 8-121975 Renfrew Road
Shawnigan Lake, BC, Canada V0R2W1
(250)743-6207 - 73.-110.Rank: #73-110>15
Grades: 9-121175 West Baseline Road
Claremont, CA 91711
(909)482-5214 - 73.-110.Rank: #73-110>15
Grades: 9-12 | 4-12 (day)362 Mariposa Avenue
Ottawa, Canada K1M0T3
(613)749-9630 - 73.-110.Rank: #73-110>15
Grades: 6-12425 South Lindbergh Blvd.
St. Louis, MO 63131
(314)692-6640 - 73.-110.Rank: #73-110>15
Grades: 8-12 | Pre-K-12 (day)8401 Belvedere Rd
West Palm Beach, FL 33411
(561)657-3470 - 73.-110.Rank: #73-110>15
Grades: 9-122 School Way
Watsonville, CA 95076
(831)768-6137 - 73.-110.Rank: #73-110>15
Grades: 8-12 | K-12 (day)3400 Richmond Road
Victoria, Canada V8P 4P5
(250)370-6170 - 73.-110.Rank: #73-110>15
Grades: 8-12 | 6-12 (day)6500 St. Stephen's Drive
Austin, TX 78746
(512)327-1213 - 73.-110.Rank: #73-110Branksome HallAll-Girls >15
Grades: 7-12 | Pre-K-12 (day)10 Elm Avenue
Toronto, Canada 00000
(416)920-9741 - 73.-110.Rank: #73-110>15
Grades: 6-12438 Main Street
Saco, ME 04072
(207)282-5383 - 73.-110.Rank: #73-110>15
Grades: 7-12 | Pre-K-12 (day)13051 Whittington Dr.
Houston, TX 77077
(281)496-7900 - 73.-110.Rank: #73-110>15
Grades: 9-12811 W. Donovan Street
Houston, TX 77091
(312)416-1955 - 73.-110.Rank: #73-110>15
Grades: 9-12, PG330 N. Glenview Avenue
Milwaukee , WI 53213
(414)453-4567 - 73.-110.Rank: #73-110>15
Grades: 9-124026 Maher St.
Napa, CA 94558
(312)416-1955 - 73.-110.Rank: #73-110>15
Grades: 8-12955 Harbourside Drive
North Vancouver, BC, Canada V7P 3S4
(604)998-1000 - 73.-110.Rank: #73-110Branksome Hall AsiaAll-Girls >15
Grades: 6-12 | Pre-K-12 (day)234 Global edu-ro, Daejeong-eup, Seogwipo-si
Jeju-do, South Korea 63644
82649025072 - 73.-110.Rank: #73-110>15
Grades: 7-12, PG | Pre-K-12, PG (day)17235 Seventh Street
Montverde, FL 34756
(407)469-2561 - 73.-110.Rank: #73-110>15
Grades: 6-121200 Oakdale Ave.
St. Paul, MN 55118
(651)455-1521 - 73.-110.Rank: #73-110>15
Grades: 9-124129 Lake Shore Road
Hamburg, NY 14075
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