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.

Sorted by range (alphabetically within range)		* Indicates Boarding Grades Offered
Boarding School	Type	Grades*	# Students
1.  The Oxford Academy	All-Boys	9-12, PG	1
2.  Brandon Hall School	Co-Ed	4-12, PG	4
3.  The Gow School	All-Boys	7-12, PG	5
4.  The Winchendon School	Co-Ed	9-12, PG	6
5.-7.  Grand River Academy	All-Boys	9-12, PG	7
5.-7.  Nawa Academy	Co-Ed	7-12	7
5.-7.  West Nottingham Academy	Co-Ed	9-12, PG	7
8.-18.  Academy of the Holy Family	All-Girls	9-12, PG	8
8.-18.  Dublin School	Co-Ed	9-12	8
8.-18. Hoosac School	Co-Ed	8-12, PG	8
8.-18. Howe Military School & Summer Camp	Co-Ed	5-12	8
8.-18. Landmark School	Co-Ed	9-12	8
8.-18. The Leelanau School	Co-Ed	9-12	8
8.-18. Linden Hall	All-Girls	6-12, PG	8
8.-18. Lowell Whiteman School	Co-Ed	9-12	8
8.-18. The Marvelwood School	Co-Ed	9-12, PG	8
8.-18. Oliverian School	Co-Ed	9-12, PG	8
8.-18. The Outdoor Academy	Co-Ed	10-11	8
19.-26. Blue Ridge School	All-Boys	9-12	9
19.-26. Buxton School	Co-Ed	9-12	9

Sorted by range (alphabetically within range)		* Indicates Boarding Grades Offered
Boarding School	Type	Grades*	# Students
19.-26. Chatham Hall	All-Girls	9-12	9
19.-26. Darrow School	Co-Ed	9-12	9
19.-26. Grier School	All-Girls	6-12, PG	9
19.-26. Northwood School	Co-Ed	9-12, PG	9
19.-26. Squaw Valley Academy	Co-Ed	6-12	9
19.-26. The White Mountain School	Co-Ed	9-12, PG	9
27.-62. Academy of St. Xavier	All-Boys	7-12	10
27.-62. Andrews Osborne Academy	Co-Ed	7-12	10
27.-62. Annie Wright School	All-Girls	9-12	10
27.-62. Besant Hill School (Formerly Happy Valley School)	Co-Ed	9-12	10
27.-62. Blair Academy	Co-Ed	9-12, PG	10
27.-62. Bridgton Academy	All-Boys	12-12, PG	10
27.-62. Cate School	Co-Ed	9-12	10
27.-62. CFS, The School at Church Farm	All-Boys	7-12	10
27.-62. Chapel Hill-Chauncy Hall	Co-Ed	9-12, PG	10
27.-62. Colorado Rocky Mountain School	Co-Ed	9-12	10
27.-62. Country Day School, Costa Rica	Co-Ed	8-12	10
27.-62. Fishburne Military School	All-Boys	8-12	10
27.-62. The Forman School	Co-Ed	9-12, PG	10
27.-62. Foxcroft School	All-Girls	9-12	10
27.-62. The Kiski School	All-Boys	9-12, PG	10
27.-62. The Knox School	Co-Ed	7-12	10
27.-62. Maharishi Academy of Total Knowledge	All-Boys	9-12	10
27.-62. Massanutten Military Academy	Co-Ed	7-12, PG	10
27.-62. Oak Hill Academy	Co-Ed	8-12	10
27.-62. Oldfields School	All-Girls	8-12, PG	10
27.-62. Olney Friends School	Co-Ed	9-12	10
27.-62. Purnell School	All-Girls	9-12	10
27.-62. Riverside Military Academy	All-Boys	7-12, PG	10
27.-62. St. Andrew's School - RI	Co-Ed	9-12	10
27.-62. St. Mark's School	Co-Ed	9-12	10
27.-62. St. Paul's School	Co-Ed	9-12	10
27.-62. St. Timothy's School	All-Girls	9-12, PG	10
27.-62. Salem Academy	All-Girls	9-12	10
27.-62. Scattergood Friends School	Co-Ed	9-12, PG	10
27.-62. South Kent School	All-Boys	9-12, PG	10
27.-62. Stoneleigh-Burnham School	All-Girls	7-12, PG	10
27.-62. Stuart Hall School	All-Girls	8-12	10
27.-62. Suffield Academy	Co-Ed	9-12, PG	10
27.-62. The Thacher School	Co-Ed	9-12	10
27.-62. Virginia Episcopal School	Co-Ed	9-12	10
27.-62. Woodberry Forest School	All-Boys	9-12	10
63.-85. Berkshire School	Co-Ed	9-12, PG	11
63.-85. Brenau Academy	All-Girls	9-12, PG	11
63.-85. Canterbury School	Co-Ed	9-12, PG	11
63.-85. Christ School	All-Boys	8-12	11
63.-85. Emma Willard School	All-Girls	9-12, PG	11
63.-85. Hargrave Military Academy	All-Boys	7-12, PG	11
63.-85. Kents Hill School	Co-Ed	9-12, PG	11
63.-85. The MacDuffie School	Co-Ed	9-12	11
63.-85. Miss Hall's School	All-Girls	9-12	11
63.-85. Miss Porter's School	All-Girls	9-12, PG	11
63.-85. Missouri Military Academy	All-Boys	6-12, PG	11
63.-85. Oakdale Christian Academy	Co-Ed	7-12	11
63.-85. Pomfret School	Co-Ed	9-12, PG	11
63.-85. St. Andrew's School, DE	Co-Ed	9-12	11
63.-85. St. George's School	Co-Ed	9-12	11
63.-85. St. John's Northwestern Military Academy	All-Boys	7-12, PG	11
63.-85. St. Margaret's School	All-Girls	8-12	11
63.-85. Solebury School	Co-Ed	9-12	11
63.-85. Tallulah Falls School	Co-Ed	7-12	11
63.-85. Verde Valley School	Co-Ed	9-12	11
63.-85. Vermont Academy	Co-Ed	9-12, PG	11
63.-85. Wentworth Military Academy & College	Co-Ed	9-12, PG	11
63.-85. Westover School	All-Girls	9-12	11
86.-152. Avon Old Farms School	All-Boys	9-12, PG	12
86.-152. Brewster Academy	Co-Ed	9-12, PG	12
86.-152. Brooks School	Co-Ed	9-12	12
86.-152. The Cambridge School of Weston	Co-Ed	9-12, PG	12
86.-152. Camden Military Academy	All-Boys	7-12, PG	12
86.-152. CCI The Renaissance School	Co-Ed	10-12, PG	12
86.-152. Cheshire Academy	Co-Ed	9-12, PG	12
86.-152. Choate Rosemary Hall	Co-Ed	9-12, PG	12
86.-152. Concord Academy	Co-Ed	9-12	12
86.-152. Cushing Academy	Co-Ed	9-12, PG	12
86.-152. Dana Hall School	All-Girls	9-12	12
86.-152. Deerfield Academy	Co-Ed	9-12, PG	12
86.-152. Episcopal High School	Co-Ed	9-12	12
86.-152. The Ethel Walker School	All-Girls	9-12	12
86.-152. Fountain Valley School of Colorado	Co-Ed	9-12	12
86.-152. The Glenholme School	Co-Ed	5-12, PG	12
86.-152. Gould Academy	Co-Ed	9-12, PG	12
86.-152. The Governor's Academy (formerly Governor Dummer Academy)	Co-Ed	9-12	12
86.-152. The Gunnery	Co-Ed	9-12, PG	12
86.-152. Hawaii Preparatory Academy	Co-Ed	6-12, PG	12
86.-152. Hebron Academy	Co-Ed	9-12, PG	12
86.-152. High Mowing School	Co-Ed	9-12	12
86.-152. Hill School	Co-Ed	9-12, PG	12
86.-152. Holderness School	Co-Ed	9-12, PG	12
86.-152. The Hotchkiss School	Co-Ed	9-12, PG	12
86.-152. Hyde-Bath	Co-Ed	9-12, PG	12
86.-152. Hyde-Woodstock	Co-Ed	9-12, PG	12
86.-152. Kent School	Co-Ed	9-12, PG	12
86.-152. Kimball Union Academy	Co-Ed	9-12, PG	12
86.-152. La Lumiere School	Co-Ed	9-12, PG	12
86.-152. Lake Forest Academy	Co-Ed	9-12, PG	12
86.-152. Lawrenceville School	Co-Ed	9-12, PG	12
86.-152. Loomis Chaffee School	Co-Ed	9-12, PG	12
86.-152. The Madeira School	All-Girls	9-12	12
86.-152. Mercersburg Academy	Co-Ed	9-12, PG	12
86.-152. Middlesex School	Co-Ed	9-12	12
86.-152. Midland School	Co-Ed	9-12	12
86.-152. Miller School	Co-Ed	8-12, PG	12
86.-152. New Hampton School	Co-Ed	9-12, PG	12
86.-152. New York Military Academy	Co-Ed	7-12, PG	12
86.-152. Peddie School	Co-Ed	9-12, PG	12
86.-152. Perkiomen School	Co-Ed	7-12, PG	12
86.-152. The Phelps School	All-Boys	7-12, PG	12
86.-152. Phillips Exeter Academy	Co-Ed	9-12, PG	12
86.-152. Proctor Academy	Co-Ed	9-12, PG	12
86.-152. Rosseau Lake College	Co-Ed	7-12, PG	12
86.-152. St. Anne's-Belfield School	Co-Ed	9-12	12
86.-152. Saint James School	Co-Ed	8-12	12
86.-152. St. Johnsbury Academy	Co-Ed	9-12, PG	12
86.-152. St. Thomas More School	All-Boys	8-12, PG	12
86.-152. Salisbury School	All-Boys	9-12, PG	12
86.-152. San Domenico School	All-Girls	9-12	12
86.-152. San Marcos Baptist Academy	Co-Ed	7-12	12
86.-152. Santa Catalina School	All-Girls	9-12	12
86.-152. Shattuck-St. Mary's School	Co-Ed	6-12, PG	12
86.-152. Stanstead College	Co-Ed	7-12	12
86.-152. The Storm King School	Co-Ed	8-12	12
86.-152. Subiaco Academy	All-Boys	8-12	12
86.-152. Tabor Academy	Co-Ed	9-12	12
86.-152. Thomas Jefferson School	Co-Ed	7-12, PG	12
86.-152. Tilton School	Co-Ed	9-12, PG	12
86.-152. TMI -The Episcopal School of Texas	Co-Ed	9-12	12
86.-152. Wayland Academy	Co-Ed	9-12	12
86.-152. The Webb School	Co-Ed	7-12, PG	12
86.-152. Western Reserve Academy	Co-Ed	9-12, PG	12
86.-152. Westminster School	Co-Ed	9-12, PG	12
86.-152. Wilbraham & Monson Academy	Co-Ed	9-12, PG	12
153.-165. Groton School	Co-Ed	8-12	13
153.-165. The Hun School of Princeton	Co-Ed	9-12, PG	13
153.-165. Leysin American School in Switzerland (LAS)	Co-Ed	8-12, PG	13
153.-165. The Pennington School	Co-Ed	7-12	13
153.-165. Phillips Academy Andover	Co-Ed	9-12, PG	13
153.-165. Randolph-Macon Academy	Co-Ed	6-12, PG	13
153.-165. St. Albans School	All-Boys	9-12	13
153.-165. Saint Mary's School	All-Girls	9-12	13
153.-165. The Stony Brook School	Co-Ed	7-12	13
153.-165. Trinity Pawling School	All-Boys	9-12, PG	13
153.-165. Valley Forge Military Academy	All-Boys	7-12, PG	13
153.-165. Wasatch Academy	Co-Ed	9-12, PG	13
153.-165. The Williston Northampton School	Co-Ed	9-12, PG	13
166.-188. Asheville School	Co-Ed	9-12	14
166.-188. Baylor School	Co-Ed	9-12	14
166.-188. Carlisle School	Co-Ed	9-12	14
166.-188. Christchurch School	All-Boys	9-12, PG	14
166.-188. Darlington School	Co-Ed	9-12, PG	14
166.-188. George School	Co-Ed	9-12	14
166.-188. Idyllwild Arts Academy	Co-Ed	9-12, PG	14
166.-188. Lawrence Academy	Co-Ed	9-12	14
166.-188. The Masters School	Co-Ed	9-12	14
166.-188. McCallie School	All-Boys	9-12	14
166.-188. Millbrook School	Co-Ed	9-12	14
166.-188. Milton Academy	Co-Ed	9-12	14
166.-188. North Broward Preparatory School	Co-Ed	7-12	14
166.-188. Northfield Mount Hermon School	Co-Ed	9-12, PG	14
166.-188. Ojai Valley School	Co-Ed	3-12	14
166.-188. Oregon Episcopal School	Co-Ed	9-12	14
166.-188. The Orme School of Arizona	Co-Ed	8-12, PG	14
166.-188. Portsmouth Abbey School	Co-Ed	9-12	14
166.-188. St. Andrew's-Sewanee School	Co-Ed	9-12	14
166.-188. Sedbergh School	Co-Ed	7-12	14
166.-188. Stevenson School	Co-Ed	9-12	14
166.-188. Washington Academy	Co-Ed	9-12, PG	14
166.-188. Wyoming Seminary Upper School	Co-Ed	9-12, PG	14
189.-206. Army and Navy Academy	All-Boys	7-12	15
189.-206. The Athenian School	Co-Ed	9-12	15
189.-206. The Bolles School	Co-Ed	7-12, PG	15
189.-206. EduKick Academic Soccer (Sports) Boarding School Academies	Co-Ed	8-12, PG	15
189.-206. Florida Air Academy	Co-Ed	6-12	15
189.-206. Fork Union Military Academy	All-Boys	6-12, PG	15
189.-206. Fryeburg Academy	Co-Ed	9-12, PG	15
189.-206. Garrison Forest School	All-Girls	8-12	15
189.-206. George Stevens Academy	Co-Ed	9-12	15
189.-206. The Hockaday School	All-Girls	8-12	15
189.-206. Interlochen Arts Academy	Co-Ed	9-12, PG	15
189.-206. New Mexico Military Institute	Co-Ed	9-12, PG	15
189.-206. Oakwood Friends School	Co-Ed	9-12	15
189.-206. The Putney School	Co-Ed	9-12, PG	15
189.-206. Saint Andrew's School	Co-Ed	9-12	15
189.-206. Shawnigan Lake School	Co-Ed	8-12	15
189.-206. TASIS The American School in England	Co-Ed	9-12, PG	15
189.-206. Westtown School	Co-Ed	9-12	15
207.-238. Admiral Farragut Academy	Co-Ed	6-12	>15
207.-238. Brentwood College School	Co-Ed	9-12	>15
207.-238. Bronte College of Canada	Co-Ed	9-12, PG	>15
207.-238. Cranbrook Schools	Co-Ed	9-12	>15
207.-238. Culver Academies	Co-Ed	9-12	>15
207.-238. Dunn School	Co-Ed	9-12	>15
207.-238. Foxcroft Academy	Co-Ed	9-12, PG	>15
207.-238. Georgetown Preparatory School	All-Boys	9-12	>15
207.-238. Houghton Academy	Co-Ed	9-12, PG	>15
207.-238. Indian Springs School	Co-Ed	9-12	>15
207.-238. Rabun Gap-Nacoochee School	Co-Ed	7-12	>15
207.-238. St. Catherine's Military Academy	All-Boys	4-8	>15
207.-238. Saint John's Preparatory School	Co-Ed	9-12, PG	>15
207.-238. St. Stephen's Episcopal School	Co-Ed	8-12	>15
207.-238. Villanova Preparatory School	Co-Ed	9-12	>15
207.-238. The Webb Schools	Co-Ed	9-12	>15
207.-238. Ashbury College	Co-Ed	9-12	>15
207.-238. The Delphian School	Co-Ed	3-12	>15
207.-238. St. Andrew's College	All-Boys	6-12	>15
207.-238. The Brook Hill School	Co-Ed	8-12	>15
207.-238. Flintridge Sacred Heart Academy	All-Girls	9-12	>15
207.-238. Havergal College	All-Girls	9-12	>15
207.-238. The King's Academy	Co-Ed	7-12	>15
207.-238. Montverde Academy	Co-Ed	7-12, PG	>15
207.-238. St. Michaels University School	Co-Ed	8-12	>15
207.-238. Woodside Priory School (The Priory)	Co-Ed	9-12	>15
207.-238. The Bishop Strachan School	All-Girls	7-12	>15
207.-238. Cotter Schools	Co-Ed	9-12, PG	>15
207.-238. Monte Vista Christian School	Co-Ed	9-12	>15
207.-238. Ridley College	Co-Ed	Pre-K-12, PG	>15
207.-238. Family First Academy	Co-Ed	8-12	>15
207.-238. Girard College	Co-Ed	1-12	>15

•  View all schools sorted by "average class size"

Top School Listings by Category:

    Compare among:  All schools Schools with 400+ students Schools with 200-400 students Schools with < 200 students Military schools only All-girls schools only All-boys schools only

• Community Size - Largest student body (number of students)
• Community Size - Smallest student body (number of students)
• Boarding Focus - Highest percentage of boarding students
• Diversity - Highest percentage of international students
• Diversity - Highest percentage of students of color
• Affordability - Least expensive tuition
• Affordability - Highest percentage of students on financial aid
• Student Attention - Smallest average class sizes
• Student Attention - Lowest teacher:student ratio
• Faculty Education - Highest percentage of faculty with advanced degrees
• School Resources - Largest endowments
• School Resources - Endowment per student
• Selectivity - Lowest acceptance rates
• Offering Breadth - Most sports offered
• Offering Breadth - Most extracurriculars offered
• Offering Breadth - Most AP/advanced courses offered
• Student Test Scores - Highest average SAT scores
• Student Test Scores - Highest average SSAT score
• School History - Oldest founding date