Among "All Schools," view the twenty boarding schools with the "smallest student bodies." First, some important notes:
- School size comparisons are based on overall population of the school, not the number of boarding students at the school.
- The balance between boarders and day students can also be another factor to consider when looking at school size.
| Sorted by range (alphabetically within range) | * Indicates Boarding Grades Offered | ||
|
Boarding
School
|
School Type
|
Grades*
|
# Students
|
| 1. The Outdoor Academy | Co-Ed | 10-11 | 32 |
| 2. Colorado Timberline Academy | Co-Ed | 9-12, PG | 46 |
| 3. The Oxford Academy | All-Boys | 9-12, PG | 48 |
| 4. Oliverian School | Co-Ed | 8-12 | 50 |
| 5.-6. Nawa Academy | Co-Ed | 7-12 | 55 |
| 5.-6. Scattergood Friends School | Co-Ed | 9-12, PG | 55 |
| 7. Oakdale Christian Academy | Co-Ed | 7-12 | 57 |
| 8. Olney Friends School | Co-Ed | 9-12 | 61 |
| 9.-11. Brenau Academy | All-Girls | 9-12, PG | 80 |
| 9.-11. The Leelanau School | Co-Ed | 9-12 | 80 |
| 9.-11. Thomas Jefferson School | Co-Ed | 7-12, PG | 80 |
| 12.-13. Buxton School | Co-Ed | 9-12 | 90 |
| 12.-13. Sedbergh School | Co-Ed | 7-12 | 90 |
| 14. Midland School | Co-Ed | 9-12 | 92 |
| 15. Besant Hill School (Formerly Happy Valley School) | Co-Ed | 9-12 | 95 |
| 16.-20. Advanced Academy of Georgia | Co-Ed | 11-12 | 100 |
| 16.-20. The Glenholme School | Co-Ed | 6-12, PG | 100 |
| 16.-20. Lowell Whiteman School | Co-Ed | 9-12 | 100 |
| 16.-20. Pine Ridge School | Co-Ed | 7-12, PG | 100 |
| 16.-20. White Mountain School | Co-Ed | 9-12, PG | 100 |
| Sorted by range (alphabetically within range) | * Indicates Boarding Grades Offered | ||
|
Boarding
School
|
School Type
|
Grades*
|
# Students
|
| 21. Squaw Valley Academy | Co-Ed | 6-12 | 110 |
| 22. High Mowing School | Co-Ed | 9-12 | 112 |
| 23. Grand River Academy | All-Boys | 9-12, PG | 118 |
| 24.-27. Brandon Hall School | Co-Ed | 4-12, PG | 120 |
| 24.-27. CCI The Renaissance School | Co-Ed | 10-12, PG | 120 |
| 24.-27. Southwestern Academy | Co-Ed | 7-12, PG | 120 |
| 24.-27. The Storm King School | Co-Ed | 9-12 | 120 |
| 28. Darrow School | Co-Ed | 9-12 | 123 |
| 29.-31. Hoosac School | Co-Ed | 8-12, PG | 125 |
| 29.-31. Linden Hall | All-Girls | 6-12, PG | 125 |
| 29.-31. Purnell School | All-Girls | 9-12 | 125 |
| 32. Verde Valley School | Co-Ed | 9-12 | 126 |
| 33. Stoneleigh-Burnham School | All-Girls | 7-12, PG | 127 |
| 34.-36. Conserve School | Co-Ed | 9-12 | 130 |
| 34.-36. Dublin School | Co-Ed | 9-12, PG | 130 |
| 34.-36. The Knox School | Co-Ed | 7-12 | 130 |
| 37. Chatham Hall | All-Girls | 9-12 | 132 |
| 38.-40. Annie Wright School | All-Girls | 9-12 | 140 |
| 38.-40. Oak Hill Academy | Co-Ed | 8-12 | 140 |
| 38.-40. Tallulah Falls School | Co-Ed | 7-12 | 140 |
| 41. Rosseau Lake College | Co-Ed | 7-12 | 141 |
| 42. The Gow School | All-Boys | 7-12, PG | 143 |
| 43. The Marvelwood School | Co-Ed | 9-12, PG | 144 |
| 44.-46. Miller School | Co-Ed | 8-12, PG | 145 |
| 44.-46. St. Timothy's School | All-Girls | 9-12, PG | 145 |
| 44.-46. South Kent School | All-Boys | 9-12, PG | 145 |
| 47. Houghton Academy | Co-Ed | 9-12, PG | 148 |
| 48.-49. The Phelps School | All-Boys | 7-12, PG | 150 |
| 48.-49. St. Catherine's Military Academy | All-Boys | 4-8 | 150 |
| 50. West Nottingham Academy | Co-Ed | 9-12, PG | 154 |
| 51. St. Margaret's School | All-Girls | 8-12 | 157 |
| 52.-53. Colorado Rocky Mountain School | Co-Ed | 9-12 | 160 |
| 52.-53. San Domenico School | All-Girls | 9-12 | 160 |
| 54. La Lumiere School | Co-Ed | 9-12, PG | 165 |
| 55. Subiaco Academy | All-Boys | 9-12 | 166 |
| 56. Northwood School | Co-Ed | 9-12, PG | 168 |
| 57. Orme School | Co-Ed | 8-12, PG | 170 |
| 58. Chapel Hill-Chauncy Hall | Co-Ed | 9-12, PG | 175 |
| 59.-60. CFS, The School at Church Farm | All-Boys | 7-12 | 180 |
| 59.-60. Oakwood Friends School | Co-Ed | 9-12 | 180 |
| 61. Salem Academy | All-Girls | 9-12 | 183 |
| 62.-64. Country Day School, Costa Rica | Co-Ed | 8-12 | 185 |
| 62.-64. Hyde-Woodstock | Co-Ed | 9-12, PG | 185 |
| 62.-64. Oldfields School | All-Girls | 8-12, PG | 185 |
| 65.-66. The Forman School | Co-Ed | 9-12, PG | 186 |
| 65.-66. Howe Military School & Summer Camp | Co-Ed | 5-12 | 186 |
| 67.-68. Blue Ridge School | All-Boys | 9-12 | 189 |
| 67.-68. Bridgton Academy | All-Boys | 12-12, PG | 189 |
| 69.-70. Dunn School | Co-Ed | 9-12 | 190 |
| 69.-70. Stanstead College | Co-Ed | 7-12 | 190 |
| 71. Westover School | All-Girls | 9-12 | 193 |
| 72.-73. Foxcroft School | All-Girls | 9-12 | 195 |
| 72.-73. Miss Hall's School | All-Girls | 9-12 | 195 |
| 74. St. Andrew's-Sewanee School | Co-Ed | 9-12 | 198 |
| 75.-77. Fishburne Military School | All-Boys | 8-12 | 200 |
| 75.-77. Massanutten Military Academy | Co-Ed | 7-12, PG | 200 |
| 75.-77. New York Military Academy | Co-Ed | 7-12 | 200 |
| 78. Hyde-Bath | Co-Ed | 9-12, PG | 201 |
| 79. Wasatch Academy | Co-Ed | 9-12, PG | 205 |
| 80. Wentworth Military Academy & College | Co-Ed | 9-12, PG | 206 |
| 81. Grier School | All-Girls | 7-12, PG | 207 |
| 82.-83. The Kiski School | All-Boys | 9-12, PG | 210 |
| 82.-83. St. Thomas More School | All-Boys | 8-12, PG | 210 |
| 84.-86. Christ School | All-Boys | 8-12 | 215 |
| 84.-86. Christchurch School | All-Boys | 8-12, PG | 215 |
| 84.-86. Perkiomen School | Co-Ed | 7-12, PG | 215 |
| 87. St. Andrew's School - RI | Co-Ed | 9-12 | 216 |
| 88.-89. Solebury School | Co-Ed | 9-12, PG | 220 |
| 88.-89. The Winchendon School | Co-Ed | 8-12, PG | 220 |
| 90. Fountain Valley School of Colorado | Co-Ed | 9-12 | 225 |
| 91.-92. The MacDuffie School | Co-Ed | 9-12 | 226 |
| 91.-92. The Putney School | Co-Ed | 9-12 | 226 |
| 93.-94. Kents Hill School | Co-Ed | 9-12, PG | 230 |
| 93.-94. Wayland Academy | Co-Ed | 9-12 | 230 |
| 95. Saint James School | Co-Ed | 8-12 | 235 |
| 96.-97. Gould Academy | Co-Ed | 9-12, PG | 240 |
| 96.-97. Tilton School | Co-Ed | 9-12, PG | 240 |
| 98. Family First Academy | Co-Ed | 8-12 | 241 |
| 99. The Thacher School | Co-Ed | 9-12 | 246 |
| 100. Asheville School | Co-Ed | 9-12 | 251 |
| 101. Millbrook School | Co-Ed | 9-12 | 255 |
| 102. Garrison Forest School | All-Girls | 8-12 | 258 |
| 103.-104. Hebron Academy | Co-Ed | 9-12, PG | 260 |
| 103.-104. San Marcos Baptist Academy | Co-Ed | 7-12 | 260 |
| 105. Cate School | Co-Ed | 9-12 | 265 |
| 106. Vermont Academy | Co-Ed | 9-12, PG | 266 |
| 107. The Ethel Walker School | All-Girls | 9-12 | 268 |
| 108.-109. Idyllwild Arts Academy | Co-Ed | 9-12, PG | 270 |
| 108.-109. Virginia Episcopal School | Co-Ed | 9-12 | 270 |
| 110. The Delphian School | Co-Ed | 3-12 | 272 |
| 111. Holderness School | Co-Ed | 9-12, PG | 275 |
| 112. Santa Catalina School | All-Girls | 9-12 | 283 |
| 113. St. Andrew's School, DE | Co-Ed | 9-12 | 287 |
| 114.-115. Camden Military Academy | All-Boys | 7-12, PG | 292 |
| 114.-115. Missouri Military Academy | All-Boys | 6-12, PG | 292 |
| 116.-117. Saint Mary's School | All-Girls | 9-12 | 294 |
| 116.-117. Salisbury School | All-Boys | 9-12, PG | 294 |
| 118. The Gunnery | Co-Ed | 9-12, PG | 297 |
| 119.-122. Andrews Osborne Academy | Co-Ed | 7-12 | 300 |
| 119.-122. The Athenian School | Co-Ed | 9-12 | 300 |
| 119.-122. Indian Springs School | Co-Ed | 9-12 | 300 |
| 119.-122. The Webb School | Co-Ed | 7-12, PG | 300 |
| 123. Oregon Episcopal School | Co-Ed | 9-12 | 305 |
| 124. George Stevens Academy | Co-Ed | 9-12 | 310 |
| 125. Emma Willard School | All-Girls | 9-12, PG | 314 |
| 126. The Madeira School | All-Girls | 9-12 | 317 |
| 127. Stuart Hall School | All-Girls | 8-12 | 320 |
| 128.-131. The Cambridge School of Weston | Co-Ed | 9-12, PG | 325 |
| 128.-131. New Hampton School | Co-Ed | 9-12, PG | 325 |
| 128.-131. Trinity Pawling School | All-Boys | 9-12, PG | 325 |
| 128.-131. Villanova Preparatory School | Co-Ed | 9-12 | 325 |
| 132. Miss Porter's School | All-Girls | 9-12, PG | 326 |
| 133. Saint John's Preparatory School | Co-Ed | 9-12, PG | 328 |
| 134.-135. St. John's Northwestern Military Academy | All-Boys | 7-12 | 335 |
| 134.-135. St. Mark's School | Co-Ed | 9-12 | 335 |
| 136. Cotter Schools | Co-Ed | 9-12, PG | 339 |
| 137. TASIS The American School in England | Co-Ed | 9-12, PG | 340 |
| 138. The Stony Brook School | Co-Ed | 7-12 | 341 |
| 139. Army and Navy Academy | All-Boys | 7-12 | 343 |
| 140. Kimball Union Academy | Co-Ed | 9-12, PG | 344 |
| 141. Proctor Academy | Co-Ed | 9-12 | 345 |
| 142. Pomfret School | Co-Ed | 9-12, PG | 349 |
| 143.-146. Bronte College of Canada | Co-Ed | 9-12, PG | 350 |
| 143.-146. Middlesex School | Co-Ed | 9-12 | 350 |
| 143.-146. Ojai Valley School | Co-Ed | 3-12 | 350 |
| 143.-146. Woodside Priory School | Co-Ed | 9-12 | 350 |
| 147.-148. Groton School | Co-Ed | 8-12 | 353 |
| 147.-148. St. George's School | Co-Ed | 9-12 | 353 |
| 149.-150. Portsmouth Abbey School | Co-Ed | 9-12 | 354 |
| 149.-150. Rabun Gap-Nacoochee School | Co-Ed | 7-12 | 354 |
| 151. Canterbury School | Co-Ed | 9-12, PG | 355 |
| 152.-154. Brewster Academy | Co-Ed | 9-12, PG | 360 |
| 152.-154. Florida Air Academy | Co-Ed | 6-12 | 360 |
| 152.-154. Wilbraham & Monson Academy | Co-Ed | 9-12, PG | 360 |
| 155. Brooks School | Co-Ed | 9-12 | 361 |
| 156. Concord Academy | Co-Ed | 9-12 | 364 |
| 157. TMI -The Episcopal School of Texas | Co-Ed | 9-12 | 365 |
| 158. Leysin American School in Switzerland | Co-Ed | 9-12, PG | 370 |
| 159. The Governor's Academy (formerly Governor Dummer Academy) | Co-Ed | 9-12 | 372 |
| 160.-161. Berkshire School | Co-Ed | 9-12, PG | 375 |
| 160.-161. Westminster School | Co-Ed | 9-12, PG | 375 |
| 162. Riverside Military Academy | All-Boys | 7-12 | 380 |
| 163.-164. Cheshire Academy | Co-Ed | 9-12, PG | 385 |
| 163.-164. The Webb Schools | Co-Ed | 9-12 | 385 |
| 165. Shattuck-St. Mary's School | Co-Ed | 6-12, PG | 387 |
| 166. Lake Forest Academy | Co-Ed | 9-12, PG | 390 |
| 167. The Linsly School | Co-Ed | 7-12 | 391 |
| 168. Lawrence Academy | Co-Ed | 9-12 | 394 |
| 169. Admiral Farragut Academy | Co-Ed | 6-12 | 395 |
| 170.-173. Hargrave Military Academy | All-Boys | 7-12, PG | 400 |
| 170.-173. Suffield Academy | Co-Ed | 9-12, PG | 400 |
| 170.-173. Westtown School | Co-Ed | 9-12 | 400 |
| 170.-173. Woodberry Forest School | All-Boys | 9-12 | 400 |
| 174. The King's Academy | Co-Ed | 7-12 | 403 |
| 175.-177. Flintridge Sacred Heart Academy | All-Girls | 9-12 | 407 |
| 175.-177. Randolph-Macon Academy | Co-Ed | 6-12, PG | 407 |
| 175.-177. Western Reserve Academy | Co-Ed | 9-12, PG | 407 |
| 178.-179. Avon Old Farms School | All-Boys | 9-12, PG | 410 |
| 178.-179. The Masters School | Co-Ed | 9-12 | 410 |
| 180. Brentwood College School | Co-Ed | 9-12 | 430 |
| 181. Mercersburg Academy | Co-Ed | 9-12, PG | 433 |
| 182. Episcopal High School | Co-Ed | 9-12 | 435 |
| 183.-184. Blair Academy | Co-Ed | 9-12, PG | 440 |
| 183.-184. Shawnigan Lake School | Co-Ed | 8-12 | 440 |
| 185. Cushing Academy | Co-Ed | 9-12, PG | 445 |
| 186. St. Stephen's Episcopal School | Co-Ed | 8-12 | 450 |
| 187. Landmark School | Co-Ed | 9-12 | 455 |
| 188.-189. Georgetown Preparatory School | All-Boys | 9-12 | 460 |
| 188.-189. The Williston Northampton School | Co-Ed | 9-12, PG | 460 |
| 190. Wyoming Seminary Upper School | Co-Ed | 9-12, PG | 463 |
| 191. Carlisle School | Co-Ed | 9-12 | 469 |
| 192. The Pennington School | Co-Ed | 7-12 | 472 |
| 193. Havergal College | All-Girls | 9-12 | 475 |
| 194. The Hun School of Princeton | Co-Ed | 9-12, PG | 480 |
| 195. Dana Hall School | All-Girls | 9-12 | 482 |
| 196. Hill School | Co-Ed | 9-12, PG | 485 |
| 197.-198. Interlochen Arts Academy | Co-Ed | 9-12, PG | 500 |
| 197.-198. Tabor Academy | Co-Ed | 9-12 | 500 |
| 199. The Brook Hill School | Co-Ed | 8-12 | 510 |
| 200. George School | Co-Ed | 9-12 | 519 |
| 201.-202. Peddie School | Co-Ed | 9-12, PG | 520 |
| 201.-202. Stevenson School | Co-Ed | 9-12 | 520 |
| 203. St. Paul's School | Co-Ed | 9-12 | 527 |
| 204. Fork Union Military Academy | All-Boys | 6-12, PG | 535 |
| 205. St. Andrew's College | All-Boys | 6-12, PG | 550 |
| 206. Kent School | Co-Ed | 9-12, PG | 565 |
| 207. The Hotchkiss School | Co-Ed | 9-12, PG | 574 |
| 208. Montverde Academy | Co-Ed | 7-12, PG | 580 |
| 209.-210. Hawaii Preparatory Academy | Co-Ed | 6-12, PG | 600 |
| 209.-210. Saint Andrew's School | Co-Ed | 9-12 | 600 |
| 211. Deerfield Academy | Co-Ed | 9-12, PG | 605 |
| 212. Northfield Mount Hermon School | Co-Ed | 9-12, PG | 612 |
| 213. Ridley College | Co-Ed | 5-12, PG | 632 |
| 214. McCallie School | All-Boys | 9-12 | 650 |
| 215. Milton Academy | Co-Ed | 9-12 | 680 |
| 216. Fryeburg Academy | Co-Ed | 9-12, PG | 690 |
| 217. Baylor School | Co-Ed | 9-12 | 700 |
| 218. Loomis Chaffee School | Co-Ed | 9-12, PG | 720 |
| 219. Girard College | Co-Ed | 1-12 | 752 |
| 220. Cranbrook Schools | Co-Ed | 9-12 | 770 |
| 221. Monte Vista Christian School | Co-Ed | 9-12 | 773 |
| 222. Culver Academies | Co-Ed | 9-12, PG | 792 |
| 223. Lawrenceville School | Co-Ed | 9-12, PG | 795 |
| 224. St. Anne's-Belfield School | Co-Ed | 9-12 | 831 |
| 225. Choate Rosemary Hall | Co-Ed | 9-12, PG | 848 |
| 226. New Mexico Military Institute | Co-Ed | 9-12, PG | 870 |
| 227. The Bishop Strachan School | All-Girls | 7-12 | 885 |
| 228. St. Michaels University School | Co-Ed | 8-12 | 920 |
| 229. Darlington School | Co-Ed | 9-12, PG | 932 |
| 230. St. Johnsbury Academy | Co-Ed | 9-12, PG | 1000 |
| 231. The Hockaday School | All-Girls | 8-12 | 1041 |
| 232. Phillips Exeter Academy | Co-Ed | 9-12, PG | 1045 |
| 233. Phillips Academy Andover | Co-Ed | 9-12, PG | 1096 |
| 234. The Bolles School | Co-Ed | 7-12, PG | 1120 |
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