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.-4.  Brandon Hall School	Co-Ed	4-12, PG	4
1.-4.  The Greenwood School	All-Boys	4-9	4
1.-4.  Hampshire Country School	All-Boys	3-12	4
1.-4.  Linden Hill School	All-Boys	3-9	4
5.-7.  The Gow School	All-Boys	7-12, PG	5
5.-7.  Oakland School	Co-Ed	9-12	5
5.-7.  Wolfeboro: The Summer Boarding School	Co-Ed	6-12, PG	5
8.  The Winchendon School	Co-Ed	9-12, PG	6
9.-12.  Grand River Academy	All-Boys	9-12, PG	7
9.-12. Lustre Christian High School	Co-Ed	9-12	7
9.-12. Nawa Academy	Co-Ed	7-12	7
9.-12. West Nottingham Academy	Co-Ed	9-12, PG	7
13.-25. Academy of the Holy Family	All-Girls	9-12, PG	8
13.-25. Chatham Hall	All-Girls	9-12	8
13.-25. Dublin School	Co-Ed	9-12	8
13.-25. Hoosac School	Co-Ed	8-12, PG	8
13.-25. Howe Military School & Summer Camp	Co-Ed	5-12	8
13.-25. Hyde-Woodstock	Co-Ed	9-12, PG	8
13.-25. Landmark School	Co-Ed	9-12	8
13.-25. The Leelanau School	Co-Ed	9-12	8

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