Smallest Average Class Size

Among "All Schools," view the twenty boarding schools with the "smallest average class sizes." First, some important notes:

• 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 Sizes:

Among All Schools (out of 303 schools)

Boarding School	Type	Grades*	# Students
1.-5.  Fenster School	Co-Ed	9-12, PG	4
1.-5.  The Gow School	All-Boys	7-12, PG	4
1.-5.  The Greenwood School	All-Boys	6-12	4
1.-5.  Hampshire Country School	All-Boys	3-12	4
1.-5.  Linden Hill School	All-Boys	8-9	4
6.-11.  Bachman Academy	Co-Ed	6-12, PG	5
6.-11.  Brehm Preparatory School	Co-Ed	6-12, PG	5
6.-11.  Eagle Hill School	Co-Ed	8-12	5
6.-11.  Oakland School	Co-Ed	9-12	5
6.-11. Valley International Academy	Co-Ed	9-12, PG	5
6.-11. Wolfeboro: The Summer Boarding School	Co-Ed	6-12, PG	5
12.-16. Brandon Hall School	Co-Ed	6-12, PG	6
12.-16. The Leelanau School	Co-Ed	9-12	6
12.-16. Middlebridge School	Co-Ed	7-12, PG	6
12.-16. St. Andrew's Academy	Co-Ed	6-12	6
12.-16. The Winchendon School	Co-Ed	9-12, PG	6
17.-19. Ekklesia Mountain High	Co-Ed	9-12	7
17.-19. Grand River Academy	All-Boys	9-12, PG	7
17.-19. St. Margaret's School	All-Girls	8-12	7
20.-35. Academy of the Holy Family	All-Girls	9-12	8

Boarding School	Type	Grades*	# Students
20.-35. Carlbrook School	Co-Ed	9-12, PG	8
20.-35. Chamberlain-Hunt Academy	All-Boys	7-12	8
20.-35. Chatham Hall	All-Girls	9-12	8
20.-35. Dublin School	Co-Ed	9-12	8
20.-35. Ecole d’Humanité	Co-Ed	9-12, PG	8
20.-35. The Forman School	Co-Ed	9-12, PG	8
20.-35. Hoosac School	Co-Ed	8-12, PG	8
20.-35. The Howe School and Summer Camp	Co-Ed	7-12	8
20.-35. Hyde School - Woodstock, CT	Co-Ed	9-12, PG	8
20.-35. The Kildonan School	Co-Ed	7-12, PG	8
20.-35. Landmark School	Co-Ed	9-12	8
20.-35. The Marvelwood School	Co-Ed	9-12, PG	8
20.-35. Oldfields School	All-Girls	8-12, PG	8
20.-35. Oliverian School	Co-Ed	9-12, PG	8
20.-35. The Phelps School	All-Boys	7-12, PG	8
36.-45. Blue Ridge School	All-Boys	9-12	9
36.-45. Buxton School	Co-Ed	9-12	9
36.-45. Darrow School	Co-Ed	9-12	9
36.-45. Grier School	All-Girls	7-12, PG	9
36.-45. Lustre Christian High School	Co-Ed	9-12	9
36.-45. Northwood School	Co-Ed	9-12, PG	9
36.-45. St. Timothy's School	All-Girls	9-12, PG	9
36.-45. South Kent School	All-Boys	9-12, PG	9
36.-45. Southwestern Academy	Co-Ed	6-12, PG	9
36.-45. Squaw Valley Academy	Co-Ed	9-12	9
46.-73. Besant Hill School (Formerly Happy Valley School)	Co-Ed	9-12	10
46.-73. Bridgton Academy	All-Boys	12-12, PG	10
46.-73. Cate School	Co-Ed	9-12	10
46.-73. Chapel Hill-Chauncy Hall	Co-Ed	9-12, PG	10
46.-73. Colorado Rocky Mountain School	Co-Ed	9-12, PG	10
46.-73. Country Day School, Costa Rica	Co-Ed	8-12	10
46.-73. Eaglebrook School	All-Boys	6-9	10
46.-73. Fishburne Military School	All-Boys	7-12, PG	10
46.-73. Holderness School	Co-Ed	9-12, PG	10
46.-73. The Kiski School	All-Boys	9-12, PG	10
46.-73. Massanutten Military Academy	Co-Ed	7-12, PG	10
46.-73. Midland School	Co-Ed	9-12	10
46.-73. Missouri Military Academy	All-Boys	6-12, PG	10
46.-73. Oak Hill Academy	Co-Ed	8-12	10
46.-73. Olney Friends School	Co-Ed	9-12	10
46.-73. Purnell School	All-Girls	9-12	10
46.-73. The Rectory School	Co-Ed	5-9	10
46.-73. St. Andrew's School	Co-Ed	9-12, PG	10
46.-73. Saint Mary's School	All-Girls	9-12	10
46.-73. Scattergood Friends School	Co-Ed	9-12, PG	10
46.-73. Stoneleigh-Burnham School	All-Girls	7-12, PG	10
46.-73. Stuart Hall School	Co-Ed	8-12, PG	10
46.-73. Suffield Academy	Co-Ed	9-12, PG	10
46.-73. Venta Preparatory School	Co-Ed	K-10	10
46.-73. Virginia Episcopal School	Co-Ed	9-12	10
46.-73. West Nottingham Academy	Co-Ed	9-12, PG	10
46.-73. The White Mountain School	Co-Ed	9-12, PG	10
46.-73. Woodberry Forest School	All-Boys	9-12	10
74.-98. Blair Academy	Co-Ed	9-12, PG	11
74.-98. Buffalo Seminary	All-Girls	9-12	11
74.-98. Canterbury School	Co-Ed	9-12, PG	11
74.-98. Fountain Valley School of Colorado	Co-Ed	9-12	11
74.-98. Hargrave Military Academy	All-Boys	7-12, PG	11
74.-98. Hillside School	All-Boys	5-9	11
74.-98. Kents Hill School	Co-Ed	9-12, PG	11
74.-98. The Knox School	Co-Ed	7-12, PG	11
74.-98. The MacDuffie School	Co-Ed	9-12, PG	11
74.-98. Miss Hall's School	All-Girls	9-12	11
74.-98. Miss Porter's School	All-Girls	9-12	11
74.-98. New Hampton School	Co-Ed	9-12, PG	11
74.-98. Oakdale Christian Academy	Co-Ed	7-12	11
74.-98. Pomfret School	Co-Ed	9-12, PG	11
74.-98. St. Andrew's School, DE	Co-Ed	9-12	11
74.-98. St. George's School	Co-Ed	9-12	11
74.-98. Saint James School	Co-Ed	8-12	11
74.-98. St. John's Northwestern Military Academy	All-Boys	7-12, PG	11
74.-98. Salem Academy	All-Girls	9-12	11
74.-98. Solebury School	Co-Ed	9-12	11
74.-98. The Thacher School	Co-Ed	9-12	11
74.-98. Tilton School	Co-Ed	9-12, PG	11
74.-98. Verde Valley School	Co-Ed	9-12	11
74.-98. Vermont Academy	Co-Ed	9-12, PG	11
74.-98. Wentworth Military Academy & College	Co-Ed	9-12, PG	11
99.-176. Andrews Osborne Academy	Co-Ed	7-12	12
99.-176. Annie Wright School	All-Girls	9-12	12
99.-176. Avon Old Farms School	All-Boys	9-12, PG	12
99.-176. Bement School	Co-Ed	3-9	12
99.-176. Berkshire School	Co-Ed	9-12, PG	12
99.-176. Brewster Academy	Co-Ed	9-12, PG	12
99.-176. Brooks School	Co-Ed	9-12	12
99.-176. Camden Military Academy	All-Boys	7-12, PG	12
99.-176. Cardigan Mountain School	All-Boys	6-9	12
99.-176. CCI The Renaissance School	Co-Ed	10-12, PG	12
99.-176. CFS, The School at Church Farm	All-Boys	7-12	12
99.-176. Cheshire Academy	Co-Ed	9-12, PG	12
99.-176. Choate Rosemary Hall	Co-Ed	9-12, PG	12
99.-176. Christ School	All-Boys	8-12	12
99.-176. Christchurch School	Co-Ed	9-12	12
99.-176. Concord Academy	Co-Ed	9-12	12
99.-176. Cushing Academy	Co-Ed	9-12, PG	12
99.-176. Deerfield Academy	Co-Ed	9-12, PG	12
99.-176. Episcopal High School	Co-Ed	9-12	12
99.-176. Erie First Christian Academy	Co-Ed	8-12, PG	12
99.-176. The Ethel Walker School	All-Girls	9-12, PG	12
99.-176. Fay School	Co-Ed	6-9	12
99.-176. Foxcroft School	All-Girls	9-12, PG	12
99.-176. Gould Academy	Co-Ed	9-12, PG	12
99.-176. The Governor's Academy (formerly Governor Dummer Academy)	Co-Ed	9-12	12
99.-176. The Gunnery	Co-Ed	9-12, PG	12
99.-176. Hawai'i Preparatory Academy	Co-Ed	6-12, PG	12
99.-176. Hebron Academy	Co-Ed	9-12, PG	12
99.-176. High Mowing School	Co-Ed	9-12	12
99.-176. Hill School	Co-Ed	9-12, PG	12
99.-176. The Hotchkiss School	Co-Ed	9-12, PG	12
99.-176. Hyde School - Bath, ME	Co-Ed	9-12, PG	12
99.-176. Kent School	Co-Ed	9-12, PG	12
99.-176. Kimball Union Academy	Co-Ed	9-12, PG	12
99.-176. La Lumiere School	Co-Ed	9-12, PG	12
99.-176. Lake Forest Academy	Co-Ed	9-12, PG	12
99.-176. Lawrenceville School	Co-Ed	9-12, PG	12
99.-176. Linden Hall	All-Girls	5-12, PG	12
99.-176. The Loomis Chaffee School	Co-Ed	9-12, PG	12
99.-176. The Madeira School	All-Girls	9-12	12
99.-176. Menaul School	Co-Ed	9-12	12
99.-176. Mercersburg Academy	Co-Ed	9-12, PG	12
99.-176. Middlesex School	Co-Ed	9-12	12
99.-176. Miller School of Albemarle	Co-Ed	8-12, PG	12
99.-176. New York Military Academy	Co-Ed	7-12	12
99.-176. North Country School	Co-Ed	4-9	12
99.-176. Northfield Mount Hermon School	Co-Ed	9-12, PG	12
99.-176. Oakwood Friends School	Co-Ed	9-12	12
99.-176. Ojai Valley School	Co-Ed	3-12	12
99.-176. The Orme School of Arizona	Co-Ed	8-12, PG	12
99.-176. Peddie School	Co-Ed	9-12, PG	12
99.-176. Phillips Exeter Academy	Co-Ed	9-12, PG	12
99.-176. Portsmouth Abbey School	Co-Ed	9-12	12
99.-176. Proctor Academy	Co-Ed	9-12, PG	12
99.-176. The Putney School	Co-Ed	9-12, PG	12
99.-176. Rosseau Lake College	Co-Ed	7-12, PG	12
99.-176. St. Johnsbury Academy	Co-Ed	9-12, PG	12
99.-176. St. John's Military School	All-Boys	5-12	12
99.-176. St. Mark's School	Co-Ed	9-12	12
99.-176. St. Paul's School	Co-Ed	9-12	12
99.-176. St. Thomas More School	All-Boys	8-12, PG	12
99.-176. Salisbury School	All-Boys	9-12, PG	12
99.-176. San Domenico School	All-Girls	9-12	12
99.-176. San Marcos Baptist Academy	Co-Ed	7-12	12
99.-176. Santa Catalina School	All-Girls	9-12	12
99.-176. Shattuck-St. Mary's School	Co-Ed	6-12, PG	12
99.-176. Stanstead College	Co-Ed	7-12	12
99.-176. The Storm King School	Co-Ed	8-12, PG	12
99.-176. Subiaco Academy	All-Boys	7-12	12
99.-176. Tabor Academy	Co-Ed	9-12	12
99.-176. The Taft School	Co-Ed	9-12, PG	12
99.-176. TMI -The Episcopal School of Texas	Co-Ed	8-12	12
99.-176. Valley Forge Military Academy	All-Boys	7-12, PG	12
99.-176. The Webb School	Co-Ed	7-12, PG	12
99.-176. Western Reserve Academy	Co-Ed	9-12, PG	12
99.-176. Westminster School	Co-Ed	9-12, PG	12
99.-176. Westover School	All-Girls	9-12	12
99.-176. Woodside Priory School (Priory)	Co-Ed	9-12	12
177.-192. Asheville School	Co-Ed	9-12	13
177.-192. Dana Hall School	All-Girls	9-12	13
177.-192. Emma Willard School	All-Girls	9-12, PG	13
177.-192. Groton School	Co-Ed	8-12	13
177.-192. The Hun School of Princeton	Co-Ed	9-12, PG	13
177.-192. Leysin American School in Switzerland (LAS)	Co-Ed	8-12, PG	13
177.-192. The Pennington School	Co-Ed	7-12	13
177.-192. Phillips Academy Andover	Co-Ed	9-12, PG	13
177.-192. St. Albans School	All-Boys	9-12	13
177.-192. St. Anne's-Belfield School	Co-Ed	9-12	13
177.-192. St. Stephen's School	Co-Ed	9-12, PG	13
177.-192. THINK Global School	Co-Ed	9-12	13
177.-192. Trinity Pawling School	All-Boys	9-12, PG	13
177.-192. Wasatch Academy	Co-Ed	8-12, PG	13
177.-192. Wayland Academy	Co-Ed	9-12	13
177.-192. The Williston Northampton School	Co-Ed	9-12, PG	13
193.-219. Baylor School	Co-Ed	9-12	14
193.-219. The Cambridge School of Weston	Co-Ed	9-12, PG	14
193.-219. Culver Academies	Co-Ed	9-12	14
193.-219. Darlington School	Co-Ed	9-12, PG	14
193.-219. Garrison Forest School	All-Girls	8-12	14
193.-219. George School	Co-Ed	9-12	14
193.-219. The Hockaday School	All-Girls	8-12	14
193.-219. Idyllwild Arts Academy	Co-Ed	9-12, PG	14
193.-219. Indian Springs School	Co-Ed	8-12	14
193.-219. Lawrence Academy	Co-Ed	9-12	14
193.-219. The Linsly School	Co-Ed	7-12	14
193.-219. The Masters School	Co-Ed	9-12	14
193.-219. McCallie School	All-Boys	9-12	14
193.-219. Millbrook School	Co-Ed	9-12, PG	14
193.-219. Milton Academy	Co-Ed	9-12	14
193.-219. Oak Grove School	Co-Ed	7-12	14
193.-219. Oregon Episcopal School	Co-Ed	9-12	14
193.-219. The Perkiomen School	Co-Ed	6-12, PG	14
193.-219. Randolph-Macon Academy	Co-Ed	6-12, PG	14
193.-219. Riverside Military Academy	All-Boys	7-12	14
193.-219. Rumsey Hall School	Co-Ed	6-9	14
193.-219. Saint Andrew's School	Co-Ed	9-12	14
193.-219. St. Andrew's-Sewanee School	Co-Ed	9-12	14
193.-219. Stevenson School	Co-Ed	9-12	14
193.-219. The Stony Brook School	Co-Ed	7-12	14
193.-219. Wilbraham & Monson Academy	Co-Ed	9-12, PG	14
193.-219. Wyoming Seminary Upper School	Co-Ed	9-12, PG	14
220.-242. The Athenian School	Co-Ed	9-12	15
220.-242. The Bolles School	Co-Ed	7-12, PG	15
220.-242. Dunn School	Co-Ed	9-12	15
220.-242. EF International Academy	Co-Ed	9-12	15
220.-242. Florida Air Academy	Co-Ed	6-12	15
220.-242. Fork Union Military Academy	All-Boys	6-12, PG	15
220.-242. Fryeburg Academy	Co-Ed	9-12, PG	15
220.-242. George Stevens Academy	Co-Ed	9-12	15
220.-242. Interlochen Arts Academy	Co-Ed	9-12, PG	15
220.-242. Lyndon Institute	Co-Ed	9-12, PG	15
220.-242. New Mexico Military Institute	Co-Ed	9-12, PG	15
220.-242. North Broward Preparatory School	Co-Ed	6-12	15
220.-242. Robinson School	Co-Ed	7-12	15
220.-242. Ross School	Co-Ed	7-12, PG	15
220.-242. St. Catherine's Academy	All-Boys	4-8	15
220.-242. Sandy Spring Fiends School	Co-Ed	9-12	15
220.-242. Shawnigan Lake School	Co-Ed	8-12	15
220.-242. Tallulah Falls School	Co-Ed	7-12	15
220.-242. TASIS The American School in England	Co-Ed	9-12, PG	15
220.-242. Thomas Jefferson School	Co-Ed	7-12, PG	15
220.-242. The Webb Schools	Co-Ed	9-12	15
220.-242. Western Mennonite School	Co-Ed	9-12	15
220.-242. Westtown School	Co-Ed	9-12	15
243.-281. Admiral Farragut Academy	Co-Ed	6-12	>15
243.-281. Army and Navy Academy	All-Boys	7-12	>15
243.-281. Brentwood College School	Co-Ed	9-12, PG	>15
243.-281. Bronte College of Canada	Co-Ed	9-12	>15
243.-281. Cranbrook Schools	Co-Ed	9-12	>15
243.-281. Foxcroft Academy	Co-Ed	9-12	>15
243.-281. Georgetown Preparatory School	All-Boys	9-12	>15
243.-281. Houghton Academy	Co-Ed	9-12, PG	>15
243.-281. Rabun Gap-Nacoochee School	Co-Ed	7-12	>15
243.-281. Rothesay Netherwood School	Co-Ed	6-12	>15
243.-281. Saint John's Preparatory School	Co-Ed	9-12, PG	>15
243.-281. St. Stephen's Episcopal School	Co-Ed	8-12	>15
243.-281. Villanova Preparatory School	Co-Ed	9-12	>15
243.-281. Washington Academy	Co-Ed	9-12, PG	>15
243.-281. Ashbury College	Co-Ed	9-12	>15
243.-281. Delphian School	Co-Ed	3-12	>15
243.-281. Maur Hill - Mount Academy (MH-MA)	Co-Ed	8-12	>15
243.-281. Monte Vista Christian School	Co-Ed	9-12	>15
243.-281. Ridley College	Co-Ed	Pre-K-12, PG	>15
243.-281. St. Andrew's College	All-Boys	6-12	>15
243.-281. The Brook Hill School	Co-Ed	8-12	>15
243.-281. Cotter Schools	Co-Ed	9-12, PG	>15
243.-281. Donahue Academy of Ave Maria	Co-Ed	9-12	>15
243.-281. Flintridge Sacred Heart Academy	All-Girls	9-12	>15
243.-281. Havergal College	All-Girls	9-12	>15
243.-281. The King's Academy	Co-Ed	7-12	>15
243.-281. Montverde Academy	Co-Ed	7-12, PG	>15
243.-281. St. Mary's School	Co-Ed	9-12	>15
243.-281. St. Michaels University School	Co-Ed	8-12	>15
243.-281. Woodstock Academy	Co-Ed	9-12, PG	>15
243.-281. The Bishop Strachan School	All-Girls	7-12	>15
243.-281. Columbia International College	Co-Ed	7-12, PG	>15
243.-281. St. Francis High School	All-Boys	9-12	>15
243.-281. St. John's-Ravenscourt School	Co-Ed	8-12	>15
243.-281. St. Stanislaus College-Prep	All-Boys	7-12, PG	>15
243.-281. UWC South East Asia East	Co-Ed	7-12	>15
243.-281. St. Croix Schools	Co-Ed	6-12	>15
243.-281. Mercyhurst Preparatory School	Co-Ed	9-12	>15
243.-281. Advanced Academy of Georgia	Co-Ed	11-12	>15

•  View all schools sorted by "average class size"

• 
  Linden Hill School
  (Northfield, MA)
• 
  Ekklesia Mountain High
  (Buena Vista, CO)