| Valley View School | 0.0 |
Alternative/other | Ungraded-Ungraded | 56 | 4.7 | Nonsectarian |
| Devereux School | 8.7 |
Special education | 1-12 | 114 | 6.7 | Nonsectarian |
| Stetson School | 8.9 |
Special education | 4-12 | 111 | 6.9 | Nonsectarian |
| Archway Inc | 9.4 |
Special education | 5-12 | 13 | 4.5 | Nonsectarian |
| Kathleen Burns Preparatory School | 11.8 |
Special education | 5-12 | 36 | 5.1 | Nonsectarian |
| Mercy Centre | 12.5 |
Special education | Ungraded-Ungraded | 24 | 6.0 | Roman Catholic |
| G Stanley Hall School | 12.5 |
Special education | 3-12 | 43 | 6.1 | Nonsectarian |
| Yeshiva Achei Tmimim Academy | 12.5 |
Regular elementary or secondary | Pre-KG-12 | 86 | 4.2 | Jewish |
| Bancroft School | 13.0 |
Regular elementary or secondary | KG-12 | 562 | 7.7 | Nonsectarian |
| Southbridge Christian Academy | 14.0 |
Regular elementary or secondary | KG-12 | 24 | 8.0 | Pentecostal |
| Worcester Academy | 14.3 |
Regular elementary or secondary | 6-12 | 631 | 8.9 | Nonsectarian |
| Faith Baptist Christian Academy | 15.7 |
Regular elementary or secondary | Pre-KG-12 | 45 | 7.5 | Baptist |
| Oak Hill Christian School | 17.0 |
Regular elementary or secondary | Pre-KG-9 | 30 | 5.9 | Christian (no specific denomination) |
| Sterling Nursery School | 19.1 |
Special education | Pre-KG-Pre-KG | 3 | 0.8 | Nonsectarian |
| Wilbraham & Manson Academy | 21.7 |
Regular elementary or secondary | 6-12 | 357 | 7.1 | Nonsectarian |
| South Lancaster Academy And Browning Elementary | 22.5 |
Regular elementary or secondary | Pre-KG-12 | 237 | 15.0 | Seventh-Day Adventist |
| Cottage Hill Academy | 22.5 |
Special education | 6-12 | 32 | 4.0 | Nonsectarian |
| Amherst Montessori School | 22.6 |
Montessori | Ungraded-Ungraded | 73 | 24.3 | Nonsectarian |
| Touchstone Community School | 22.8 |
Alternative/other | Ungraded-Ungraded | 129 | 10.4 | Nonsectarian |
| Rfk Lancaster School | 23.5 |
Special education | 4-12 | 36 | 1.1 | Nonsectarian |
| The Common School | 23.7 |
Regular elementary or secondary | Ungraded-Ungraded | 111 | 11.1 | Nonsectarian |
| Hillside School | 24.1 |
Regular elementary or secondary | 5-9 | 139 | 6.0 | Nonsectarian |
| Whitinsville Christian School | 24.6 |
Regular elementary or secondary | Pre-KG-12 | 551 | 13.1 | Calvinist |
| Applewild School | 25.0 |
Regular elementary or secondary | KG-9 | 282 | 7.8 | Nonsectarian |
