| New Testament Christian School | 5.2 |
Regular elementary or secondary | Pre-KG-12 | 194 | 11.7 | Baptist |
| Amego | 7.2 |
Special program emphasis | Ungraded-Ungraded | 21 | 3.8 | Nonsectarian |
| Hill Crest Academy | 7.5 |
Alternative/other | Ungraded-Ungraded | 13 | 5.0 | Nonsectarian |
| Browning Elementary & South Lancaster Academy | 8.9 |
Regular elementary or secondary | Pre-KG-12 | 238 | 15.0 | Seventh-Day Adventist |
| New England Christian Academy | 11.6 |
Regular elementary or secondary | Pre-KG-12 | 186 | 10.6 | Christian (no specific denomination) |
| Meadowridge Behavioral Health Center | 12.0 |
Special education | 6-12 | 27 | 4.5 | Nonsectarian |
| The Institute For Developmenta | 12.5 |
Special education | Ungraded-Ungraded | 46 | 5.8 | Nonsectarian |
| St Vincent School | 14.2 |
Special education | KG-12 | 53 | 10.6 | Roman Catholic |
| New England Baptist Academy | 15.6 |
Regular elementary or secondary | Pre-KG-12 | 138 | 11.6 | Baptist |
| East Gate Christian Academy | 15.7 |
Regular elementary or secondary | Pre-KG-12 | 61 | 7.6 | Christian (no specific denomination) |
| Victory Christian Academy | 16.1 |
Regular elementary or secondary | KG-12 | 14 | 4.7 | Assembly of God |
| Metro South Academy | 16.9 |
Special education | 6-12 | 14 | 4.7 | Nonsectarian |
| May Institute For Neurorehabilitation | 17.0 |
Special education | 1-12 | 48 | 1.6 | Nonsectarian |
| League School Of Greater Boston | 17.0 |
Special education | KG-12 | 83 | 5.2 | Nonsectarian |
| Mendon Mennonite School | 17.4 |
Regular elementary or secondary | 1-10 | 20 | 10.0 | Mennonite |
| Montrose School | 19.2 |
Regular elementary or secondary | 6-12 | 138 | 3.7 | Roman Catholic |
| The Judge Rotenberg Center | 19.9 |
Special education | Ungraded-Ungraded | 145 | 6.6 | Nonsectarian |
| Evergreen Center | 20.8 |
Special education | Ungraded-Ungraded | 89 | 6.8 | Nonsectarian |
| Boston Higashi School | 21.7 |
Special education | 3-12 | 80 | 1.6 | Nonsectarian |
| May Center For Child Development | 22.8 |
Special education | Pre-KG-12 | 100 | 0.8 | Nonsectarian |
| Calvary Chapel Academy | 23.1 |
Regular elementary or secondary | Pre-KG-10 | 96 | 6.0 | Christian (no specific denomination) |
| Nazarene Christian Academy | 23.8 |
Regular elementary or secondary | Pre-KG-12 | 150 | 6.7 | Church of the Nazarene |
| Whitinsville Christian School | 24.1 |
Regular elementary or secondary | Pre-KG-12 | 551 | 13.1 | Calvinist |
| Thayer Academy | 24.5 |
Regular elementary or secondary | 6-12 | 672 | 7.7 | Nonsectarian |
| Early Bird Academy Inc | 24.8 |
Regular elementary or secondary | Pre-KG-10 | 107 | 26.8 | Nonsectarian |
| Schwartz Center For Children | 24.9 |
Special education | Pre-KG-11 | 41 | 6.8 | Nonsectarian |
| New Beginnings Academy | 24.9 |
Regular elementary or secondary | Pre-KG-12 | 65 | 9.3 | Christian (no specific denomination) |
