Among "All Schools," view the twenty boarding schools with the "lowest teacher:student ratio." First, some important notes:
- Teacher:student ratios are only one indicator of student attention, as they merely indicate the number of adults on campus (in a teacher-related capacacity) relative to the number of students.
- The teacher:student ratio is different than the average class size at a school and should not be confused as such.
| Sorted by range (alphabetically within range) | * Indicates Boarding Grades Offered | ||
|
Boarding
School
|
School Type
|
Grades*
|
Teacher:Student Ratio
|
| 1.-3. The Glenholme School | Co-Ed | 6-12, PG | 1:1 |
| 1.-3. Southwestern Academy | Co-Ed | 7-12, PG | 1:1 |
| 1.-3. Wentworth Military Academy & College | Co-Ed | 9-12, PG | 1:1 |
| 4.-6. The Oxford Academy | All-Boys | 9-12, PG | 1:2 |
| 4.-6. Pine Ridge School | Co-Ed | 7-12, PG | 1:2 |
| 4.-6. Scattergood Friends School | Co-Ed | 9-12, PG | 1:2 |
| 7.-12. Brandon Hall School | Co-Ed | 4-12, PG | 1:3 |
| 7.-12. The Forman School | Co-Ed | 9-12, PG | 1:3 |
| 7.-12. Landmark School | Co-Ed | 9-12 | 1:3 |
| 7.-12. Oliverian School | Co-Ed | 8-12 | 1:3 |
| 7.-12. The Outdoor Academy | Co-Ed | 10-11 | 1:3 |
| 7.-12. White Mountain School | Co-Ed | 9-12, PG | 1:3 |
| 13.-23. Asheville School | Co-Ed | 9-12 | 1:4 |
| 13.-23. Besant Hill School (Formerly Happy Valley School) | Co-Ed | 9-12 | 1:4 |
| 13.-23. The Gow School | All-Boys | 7-12, PG | 1:4 |
| 13.-23. High Mowing School | Co-Ed | 9-12 | 1:4 |
| 13.-23. Hoosac School | Co-Ed | 8-12, PG | 1:4 |
| 13.-23. The Marvelwood School | Co-Ed | 9-12, PG | 1:4 |
| 13.-23. Olney Friends School | Co-Ed | 9-12 | 1:4 |
| 13.-23. Purnell School | All-Girls | 9-12 | 1:4 |
| Sorted by range (alphabetically within range) | * Indicates Boarding Grades Offered | ||
|
Boarding
School
|
School Type
|
Grades*
|
Teacher:Student Ratio
|
| 13.-23. St. Andrew's School, DE | Co-Ed | 9-12 | 1:4 |
| 13.-23. Shawnigan Lake School | Co-Ed | 8-12 | 1:4 |
| 13.-23. Woodberry Forest School | All-Boys | 9-12 | 1:4 |
| 24.-66. Andrews Osborne Academy | Co-Ed | 7-12 | 1:5 |
| 24.-66. Brooks School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Buxton School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Cate School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Chapel Hill-Chauncy Hall | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Choate Rosemary Hall | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Christ School | All-Boys | 8-12 | 1:5 |
| 24.-66. Colorado Rocky Mountain School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Colorado Timberline Academy | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Darrow School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Deerfield Academy | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Dublin School | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Emma Willard School | All-Girls | 9-12, PG | 1:5 |
| 24.-66. The Ethel Walker School | All-Girls | 9-12 | 1:5 |
| 24.-66. Fountain Valley School of Colorado | Co-Ed | 9-12 | 1:5 |
| 24.-66. Grand River Academy | All-Boys | 9-12, PG | 1:5 |
| 24.-66. Groton School | Co-Ed | 8-12 | 1:5 |
| 24.-66. Linden Hall | All-Girls | 6-12, PG | 1:5 |
| 24.-66. Loomis Chaffee School | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Mercersburg Academy | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Middlesex School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Midland School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Millbrook School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Milton Academy | Co-Ed | 9-12 | 1:5 |
| 24.-66. Miss Hall's School | All-Girls | 9-12 | 1:5 |
| 24.-66. New Hampton School | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. The Phelps School | All-Boys | 7-12, PG | 1:5 |
| 24.-66. Phillips Academy Andover | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Phillips Exeter Academy | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Proctor Academy | Co-Ed | 9-12 | 1:5 |
| 24.-66. St. Andrew's School - RI | Co-Ed | 9-12 | 1:5 |
| 24.-66. St. George's School | Co-Ed | 9-12 | 1:5 |
| 24.-66. St. Mark's School | Co-Ed | 9-12 | 1:5 |
| 24.-66. St. Paul's School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Salisbury School | All-Boys | 9-12, PG | 1:5 |
| 24.-66. Sedbergh School | Co-Ed | 7-12 | 1:5 |
| 24.-66. South Kent School | All-Boys | 9-12, PG | 1:5 |
| 24.-66. Suffield Academy | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. The Thacher School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Tilton School | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Verde Valley School | Co-Ed | 9-12 | 1:5 |
| 24.-66. Westminster School | Co-Ed | 9-12, PG | 1:5 |
| 24.-66. Westover School | All-Girls | 9-12 | 1:5 |
| 67.-106. Avon Old Farms School | All-Boys | 9-12, PG | 1:6 |
| 67.-106. Blue Ridge School | All-Boys | 9-12 | 1:6 |
| 67.-106. Brewster Academy | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Canterbury School | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Chatham Hall | All-Girls | 9-12 | 1:6 |
| 67.-106. Concord Academy | Co-Ed | 9-12 | 1:6 |
| 67.-106. Conserve School | Co-Ed | 9-12 | 1:6 |
| 67.-106. Episcopal High School | Co-Ed | 9-12 | 1:6 |
| 67.-106. Gould Academy | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. The Governor's Academy (formerly Governor Dummer Academy) | Co-Ed | 9-12 | 1:6 |
| 67.-106. Grier School | All-Girls | 7-12, PG | 1:6 |
| 67.-106. The Hotchkiss School | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. The Hun School of Princeton | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Hyde-Bath | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Interlochen Arts Academy | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Kents Hill School | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Kimball Union Academy | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Lowell Whiteman School | Co-Ed | 9-12 | 1:6 |
| 67.-106. The Madeira School | All-Girls | 9-12 | 1:6 |
| 67.-106. The Masters School | Co-Ed | 9-12 | 1:6 |
| 67.-106. Miller School | Co-Ed | 8-12, PG | 1:6 |
| 67.-106. Northfield Mount Hermon School | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Northwood School | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Ojai Valley School | Co-Ed | 3-12 | 1:6 |
| 67.-106. Oldfields School | All-Girls | 8-12, PG | 1:6 |
| 67.-106. Orme School | Co-Ed | 8-12, PG | 1:6 |
| 67.-106. Peddie School | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Pomfret School | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. St. Margaret's School | All-Girls | 8-12 | 1:6 |
| 67.-106. St. Timothy's School | All-Girls | 9-12, PG | 1:6 |
| 67.-106. San Domenico School | All-Girls | 9-12 | 1:6 |
| 67.-106. Solebury School | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Squaw Valley Academy | Co-Ed | 6-12 | 1:6 |
| 67.-106. Stoneleigh-Burnham School | All-Girls | 7-12, PG | 1:6 |
| 67.-106. Tabor Academy | Co-Ed | 9-12 | 1:6 |
| 67.-106. Virginia Episcopal School | Co-Ed | 9-12 | 1:6 |
| 67.-106. Wayland Academy | Co-Ed | 9-12 | 1:6 |
| 67.-106. West Nottingham Academy | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. Western Reserve Academy | Co-Ed | 9-12, PG | 1:6 |
| 67.-106. The Winchendon School | Co-Ed | 8-12, PG | 1:6 |
| 107.-150. Berkshire School | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Blair Academy | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. The Cambridge School of Weston | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Christchurch School | All-Boys | 8-12, PG | 1:7 |
| 107.-150. The Delphian School | Co-Ed | 3-12 | 1:7 |
| 107.-150. Dunn School | Co-Ed | 9-12 | 1:7 |
| 107.-150. Foxcroft School | All-Girls | 9-12 | 1:7 |
| 107.-150. George School | Co-Ed | 9-12 | 1:7 |
| 107.-150. The Gunnery | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Hebron Academy | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Hill School | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Holderness School | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Indian Springs School | Co-Ed | 9-12 | 1:7 |
| 107.-150. Kent School | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. The Kiski School | All-Boys | 9-12, PG | 1:7 |
| 107.-150. The Knox School | Co-Ed | 7-12 | 1:7 |
| 107.-150. La Lumiere School | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Lake Forest Academy | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Lawrence Academy | Co-Ed | 9-12 | 1:7 |
| 107.-150. Leysin American School in Switzerland | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. The MacDuffie School | Co-Ed | 9-12 | 1:7 |
| 107.-150. Nawa Academy | Co-Ed | 7-12 | 1:7 |
| 107.-150. Oakdale Christian Academy | Co-Ed | 7-12 | 1:7 |
| 107.-150. Oregon Episcopal School | Co-Ed | 9-12 | 1:7 |
| 107.-150. Perkiomen School | Co-Ed | 7-12, PG | 1:7 |
| 107.-150. Portsmouth Abbey School | Co-Ed | 9-12 | 1:7 |
| 107.-150. St. Andrew's-Sewanee School | Co-Ed | 9-12 | 1:7 |
| 107.-150. St. Anne's-Belfield School | Co-Ed | 9-12 | 1:7 |
| 107.-150. Saint Mary's School | All-Girls | 9-12 | 1:7 |
| 107.-150. St. Stephen's Episcopal School | Co-Ed | 8-12 | 1:7 |
| 107.-150. St. Thomas More School | All-Boys | 8-12, PG | 1:7 |
| 107.-150. Salem Academy | All-Girls | 9-12 | 1:7 |
| 107.-150. Shattuck-St. Mary's School | Co-Ed | 6-12, PG | 1:7 |
| 107.-150. The Stony Brook School | Co-Ed | 7-12 | 1:7 |
| 107.-150. The Storm King School | Co-Ed | 9-12 | 1:7 |
| 107.-150. TASIS The American School in England | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. Thomas Jefferson School | Co-Ed | 7-12, PG | 1:7 |
| 107.-150. TMI -The Episcopal School of Texas | Co-Ed | 9-12 | 1:7 |
| 107.-150. Vermont Academy | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. The Webb School | Co-Ed | 7-12, PG | 1:7 |
| 107.-150. The Webb Schools | Co-Ed | 9-12 | 1:7 |
| 107.-150. Westtown School | Co-Ed | 9-12 | 1:7 |
| 107.-150. Wilbraham & Monson Academy | Co-Ed | 9-12, PG | 1:7 |
| 107.-150. The Williston Northampton School | Co-Ed | 9-12, PG | 1:7 |
| 151.-179. Annie Wright School | All-Girls | 9-12 | 1:8 |
| 151.-179. Baylor School | Co-Ed | 9-12 | 1:8 |
| 151.-179. Brenau Academy | All-Girls | 9-12, PG | 1:8 |
| 151.-179. Camden Military Academy | All-Boys | 7-12, PG | 1:8 |
| 151.-179. CCI The Renaissance School | Co-Ed | 10-12, PG | 1:8 |
| 151.-179. CFS, The School at Church Farm | All-Boys | 7-12 | 1:8 |
| 151.-179. Cranbrook Schools | Co-Ed | 9-12 | 1:8 |
| 151.-179. Cushing Academy | Co-Ed | 9-12, PG | 1:8 |
| 151.-179. Dana Hall School | All-Girls | 9-12 | 1:8 |
| 151.-179. Garrison Forest School | All-Girls | 8-12 | 1:8 |
| 151.-179. Georgetown Preparatory School | All-Boys | 9-12 | 1:8 |
| 151.-179. Havergal College | All-Girls | 9-12 | 1:8 |
| 151.-179. Howe Military School & Summer Camp | Co-Ed | 5-12 | 1:8 |
| 151.-179. Lawrenceville School | Co-Ed | 9-12, PG | 1:8 |
| 151.-179. The Leelanau School | Co-Ed | 9-12 | 1:8 |
| 151.-179. Maharishi Academy of Total Knowledge | All-Boys | 9-12 | 1:8 |
| 151.-179. Massanutten Military Academy | Co-Ed | 7-12, PG | 1:8 |
| 151.-179. McCallie School | All-Boys | 9-12 | 1:8 |
| 151.-179. Miss Porter's School | All-Girls | 9-12, PG | 1:8 |
| 151.-179. Oakwood Friends School | Co-Ed | 9-12 | 1:8 |
| 151.-179. The Pennington School | Co-Ed | 7-12 | 1:8 |
| 151.-179. The Putney School | Co-Ed | 9-12 | 1:8 |
| 151.-179. Rabun Gap-Nacoochee School | Co-Ed | 7-12 | 1:8 |
| 151.-179. Rosseau Lake College | Co-Ed | 7-12 | 1:8 |
| 151.-179. St. Johnsbury Academy | Co-Ed | 9-12, PG | 1:8 |
| 151.-179. San Marcos Baptist Academy | Co-Ed | 7-12 | 1:8 |
| 151.-179. Santa Catalina School | All-Girls | 9-12 | 1:8 |
| 151.-179. Stanstead College | Co-Ed | 7-12 | 1:8 |
| 151.-179. Trinity Pawling School | All-Boys | 9-12, PG | 1:8 |
| 180.-188. Bridgton Academy | All-Boys | 12-12, PG | 1:9 |
| 180.-188. Country Day School, Costa Rica | Co-Ed | 8-12 | 1:9 |
| 180.-188. Culver Academies | Co-Ed | 9-12, PG | 1:9 |
| 180.-188. Randolph-Macon Academy | Co-Ed | 6-12, PG | 1:9 |
| 180.-188. St. Andrew's College | All-Boys | 6-12, PG | 1:9 |
| 180.-188. Saint Andrew's School | Co-Ed | 9-12 | 1:9 |
| 180.-188. St. Catherine's Military Academy | All-Boys | 4-8 | 1:9 |
| 180.-188. Saint James School | Co-Ed | 8-12 | 1:9 |
| 180.-188. Wyoming Seminary Upper School | Co-Ed | 9-12, PG | 1:9 |
| 189.-208. Admiral Farragut Academy | Co-Ed | 6-12 | 1:10 |
| 189.-208. The Athenian School | Co-Ed | 9-12 | 1:10 |
| 189.-208. The Brook Hill School | Co-Ed | 8-12 | 1:10 |
| 189.-208. Darlington School | Co-Ed | 9-12, PG | 1:10 |
| 189.-208. Fishburne Military School | All-Boys | 8-12 | 1:10 |
| 189.-208. Flintridge Sacred Heart Academy | All-Girls | 9-12 | 1:10 |
| 189.-208. Fork Union Military Academy | All-Boys | 6-12, PG | 1:10 |
| 189.-208. Fryeburg Academy | Co-Ed | 9-12, PG | 1:10 |
| 189.-208. George Stevens Academy | Co-Ed | 9-12 | 1:10 |
| 189.-208. Hawaii Preparatory Academy | Co-Ed | 6-12, PG | 1:10 |
| 189.-208. The Hockaday School | All-Girls | 8-12 | 1:10 |
| 189.-208. Oak Hill Academy | Co-Ed | 8-12 | 1:10 |
| 189.-208. Ridley College | Co-Ed | 5-12, PG | 1:10 |
| 189.-208. Riverside Military Academy | All-Boys | 7-12 | 1:10 |
| 189.-208. St. John's Northwestern Military Academy | All-Boys | 7-12 | 1:10 |
| 189.-208. Stevenson School | Co-Ed | 9-12 | 1:10 |
| 189.-208. Stuart Hall School | All-Girls | 8-12 | 1:10 |
| 189.-208. Subiaco Academy | All-Boys | 9-12 | 1:10 |
| 189.-208. Villanova Preparatory School | Co-Ed | 9-12 | 1:10 |
| 189.-208. Wasatch Academy | Co-Ed | 9-12, PG | 1:10 |
| 209.-211. Brentwood College School | Co-Ed | 9-12 | 1:11 |
| 209.-211. Hargrave Military Academy | All-Boys | 7-12, PG | 1:11 |
| 209.-211. Saint John's Preparatory School | Co-Ed | 9-12, PG | 1:11 |
| 212.-220. The Bishop Strachan School | All-Girls | 7-12 | 1:12 |
| 212.-220. Cheshire Academy | Co-Ed | 9-12, PG | 1:12 |
| 212.-220. Hyde-Woodstock | Co-Ed | 9-12, PG | 1:12 |
| 212.-220. Idyllwild Arts Academy | Co-Ed | 9-12, PG | 1:12 |
| 212.-220. Missouri Military Academy | All-Boys | 6-12, PG | 1:12 |
| 212.-220. Monte Vista Christian School | Co-Ed | 9-12 | 1:12 |
| 212.-220. New Mexico Military Institute | Co-Ed | 9-12, PG | 1:12 |
| 212.-220. New York Military Academy | Co-Ed | 7-12 | 1:12 |
| 212.-220. Tallulah Falls School | Co-Ed | 7-12 | 1:12 |
| 221.-222. Florida Air Academy | Co-Ed | 6-12 | 1:13 |
| 221.-222. Montverde Academy | Co-Ed | 7-12, PG | 1:13 |
| 223.-224. Army and Navy Academy | All-Boys | 7-12 | 1:14 |
| 223.-224. Carlisle School | Co-Ed | 9-12 | 1:14 |
| 225.-227. Bronte College of Canada | Co-Ed | 9-12, PG | 1:15 |
| 225.-227. EduKick Academic Soccer Boarding School Academies | Co-Ed | 8-12, PG | 1:15 |
| 225.-227. The Linsly School | Co-Ed | 7-12 | 1:15 |
| 228.-229. Family First Academy | Co-Ed | 8-12 | 1:16 |
| 228.-229. Houghton Academy | Co-Ed | 9-12, PG | 1:16 |
| 230. Girard College | Co-Ed | 1-12 | 1:17 |
| 231.-232. The King's Academy | Co-Ed | 7-12 | 1:18 |
| 231.-232. St. Michaels University School | Co-Ed | 8-12 | 1:18 |
| 233. Advanced Academy of Georgia | Co-Ed | 11-12 | 1:20 |
• View all schools sorted by "teacher:student ratio"
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