| School | State | Tuition | Students | International Students | SAT | Type and Grade |
|---|---|---|---|---|---|---|
| Oakland School | $46,500 | 45 | 5% | -- | Grades 1-8 | |
| Oakwood Friends School | $70,740 | 119 | 11% | 1145 | 8-12 | |
| Ojai Valley School | $70,500 | 323 | 11% | 1190 | 3-12 | |
| Olney Friends School | $37,900 | 50 | 30% | 1130 | 9-12 | |
| Oregon Episcopal School | $79,700 | 884 | 16% | 1358 | 9-12 | |
| Peddie School | $75,700 | 527 | 17% | 1410 | 9-12, PG | |
| The Pennington School | $79,840 | 535 | 15% | 1261 | 8-12 | |
| Perkiomen School | $78,200 | 379 | 28% | -- | 6-12 | |
| Phillips Academy Andover | $76,731 | 1165 | 15% | 1446 | 9-12, PG | |
| Phillips Exeter Academy | $69,537 | 1106 | 7.8% | 1440 | 9-12, PG | |
| Portsmouth Abbey School | $77,825 | 350 | 21% | 1460 | 9-12 | |
| Proctor Academy | $79,590 | 380 | 10% | 1200 | 9-12, PG | |
| Rabun Gap-Nacoochee School | $75,000 | 685 | 45% | 1081 | 7-12 | |
| Rectory School | $70,500 | 220 | 38% | -- | 5-9 | |
| Ridley College | CAD 87,500 | 874 | 25% | -- | 6-12 | |
| Riverside Preparatory Academy | $68,000 | 290 | 25% | 1120 | 7-12 | |
| Ross School | $89,250 | 320 | 34% | 1350 | 6-12, PG | |
| Rosseau Lake College | CAD 63,100 | 140 | 25% | -- | 7-12 | |
| Rothesay Netherwood School | CAD 68,300 | 275 | 15% | -- | 6-12 | |
| St. Albans School | $80,308 | 329 | 10% | -- | 9-12 |