| South Merrimack Christian Academy | 1.6 |
Regular elementary or secondary | Pre-KG-12 | 210 | 10.6 | Baptist |
| Milford Christian Academy | 4.7 |
Regular elementary or secondary | 1-12 | 39 | 9.1 | Christian (no specific denomination) |
| Nashua Childrens Home | 5.9 |
Special education | Ungraded-Ungraded | 26 | 7.7 | Nonsectarian |
| Nashua Christian Academy | 6.8 |
Regular elementary or secondary | KG-12 | 233 | 11.8 | Christian (no specific denomination) |
| Tabernacle Christian School | 7.9 |
Regular elementary or secondary | Pre-KG-12 | 117 | 7.8 | Baptist |
| Victory Baptist School | 10.8 |
Regular elementary or secondary | Pre-KG-12 | 75 | 9.4 | Baptist |
| Mount Zion Christian Schools | 12.2 |
Regular elementary or secondary | Pre-KG-12 | 152 | 8.9 | Christian (no specific denomination) |
| Robert B Jolicoer School | 13.8 |
Special education | 3-12 | 154 | 9.6 | Nonsectarian |
| The Derryfield School | 16.7 |
Regular elementary or secondary | 6-12 | 383 | 9.2 | Nonsectarian |
| Calvary Christian School | 17.2 |
Regular elementary or secondary | Pre-KG-12 | 233 | 13.4 | Christian (no specific denomination) |
| Hampshire Country School | 18.6 |
Regular elementary or secondary | 4-11 | 19 | 2.7 | Nonsectarian |
| Crotched Mountain School | 18.8 |
Special education | Ungraded-Ungraded | 120 | 4.0 | Nonsectarian |
| The Well School | 20.6 |
Regular elementary or secondary | Pre-KG-9 | 96 | 5.7 | Nonsectarian |
| Dublin Christian Academy | 23.3 |
Regular elementary or secondary | KG-12 | 107 | 7.2 | Christian (no specific denomination) |
| Pine Haven Boys Center | 23.8 |
Special education | Ungraded-Ungraded | 18 | 3.5 | Nonsectarian |
| Center Of Optimum Learning | 24.8 |
Special education | Ungraded-Ungraded | 12 | 2.0 | Nonsectarian |
