| Cornerstone Christian Academy | 3.8 |
Regular elementary or secondary | 2-9 | 16 | 3.5 | Baptist |
| The Lighthouse Christian Academy | 5.9 |
Regular elementary or secondary | Pre-KG-12 | 52 | 5.0 | Christian (no specific denomination) |
| Learning Skills Academy | 8.2 |
Special education | 5-12 | 19 | 2.4 | Nonsectarian |
| The Birchtree Center | 11.3 |
Special education | Pre-KG-10 | 15 | 0.8 | Nonsectarian |
| Center Of Optimum Learning | 12.0 |
Special education | Ungraded-Ungraded | 12 | 2.0 | Nonsectarian |
| Portsmouth Christian Academy | 13.0 |
Regular elementary or secondary | Pre-KG-12 | 651 | 9.0 | Christian (no specific denomination) |
| Good Shepherd School & Learning Ctr | 16.3 |
Regular elementary or secondary | Pre-KG-11 | 105 | 10.2 | Christian (no specific denomination) |
| Calvary Christian School | 16.6 |
Regular elementary or secondary | Pre-KG-12 | 233 | 13.4 | Christian (no specific denomination) |
| Strafford Learning Center | 19.1 |
Special education | 1-9 | 26 | 4.6 | Nonsectarian |
| Tri-city Christian Academy | 19.2 |
Regular elementary or secondary | Pre-KG-12 | 284 | 18.9 | Other |
| Somersworth Christian Education | 19.8 |
Regular elementary or secondary | Pre-KG-10 | 18 | 4.5 | Pentecostal |
| Lighthouse Christian Academy | 21.9 |
Regular elementary or secondary | KG-9 | 13 | 6.5 | Church of God |
| Monarch School Of New England | 22.5 |
Special education | Ungraded-Ungraded | 32 | 8.0 | Nonsectarian |
| Victory Baptist School | 23.3 |
Regular elementary or secondary | Pre-KG-12 | 75 | 9.4 | Baptist |
| Robert B Jolicoer School | 23.4 |
Special education | 3-12 | 154 | 9.6 | Nonsectarian |
| Mount Zion Christian Schools | 25.0 |
Regular elementary or secondary | Pre-KG-12 | 152 | 8.9 | Christian (no specific denomination) |
