| The Birchtree Center | 4.8 |
Special education | Pre-KG-10 | 15 | 0.8 | Nonsectarian |
| Cornerstone Christian Academy | 5.5 |
Regular elementary or secondary | 2-9 | 16 | 3.5 | Baptist |
| Seacoast Learning Collaborative | 8.2 |
Special education | 2-12 | 52 | 6.5 | Nonsectarian |
| Portsmouth Christian Academy | 11.2 |
Regular elementary or secondary | Pre-KG-12 | 651 | 9.0 | Christian (no specific denomination) |
| The Lighthouse Christian Academy | 14.0 |
Regular elementary or secondary | Pre-KG-12 | 52 | 5.0 | Christian (no specific denomination) |
| Strafford Learning Center | 17.4 |
Special education | 1-9 | 26 | 4.6 | Nonsectarian |
| Tri-city Christian Academy | 18.2 |
Regular elementary or secondary | Pre-KG-12 | 284 | 18.9 | Other |
| Somersworth Christian Education | 18.2 |
Regular elementary or secondary | Pre-KG-10 | 18 | 4.5 | Pentecostal |
| Good Shepherd School & Learning Ctr | 18.7 |
Regular elementary or secondary | Pre-KG-11 | 105 | 10.2 | Christian (no specific denomination) |
| Center Of Optimum Learning | 19.8 |
Special education | Ungraded-Ungraded | 12 | 2.0 | Nonsectarian |
| Lighthouse Christian Academy | 22.4 |
Regular elementary or secondary | KG-9 | 13 | 6.5 | Church of God |
| Monarch School Of New England | 22.9 |
Special education | Ungraded-Ungraded | 32 | 8.0 | Nonsectarian |
| Calvary Christian School | 24.6 |
Regular elementary or secondary | Pre-KG-12 | 233 | 13.4 | Christian (no specific denomination) |
