| The Lighthouse Christian Academy | 0.0 |
Regular elementary or secondary | Pre-KG-12 | 52 | 5.0 | Christian (no specific denomination) |
| Seacoast Learning Collaborative | 5.9 |
Special education | 2-12 | 52 | 6.5 | Nonsectarian |
| Center Of Optimum Learning | 6.3 |
Special education | Ungraded-Ungraded | 12 | 2.0 | Nonsectarian |
| Cornerstone Christian Academy | 9.0 |
Regular elementary or secondary | 2-9 | 16 | 3.5 | Baptist |
| Calvary Christian School | 11.6 |
Regular elementary or secondary | Pre-KG-12 | 233 | 13.4 | Christian (no specific denomination) |
| Learning Skills Academy | 14.0 |
Special education | 5-12 | 19 | 2.4 | Nonsectarian |
| Good Shepherd School & Learning Ctr | 15.8 |
Regular elementary or secondary | Pre-KG-11 | 105 | 10.2 | Christian (no specific denomination) |
| Portsmouth Christian Academy | 16.0 |
Regular elementary or secondary | Pre-KG-12 | 651 | 9.0 | Christian (no specific denomination) |
| The Birchtree Center | 16.6 |
Special education | Pre-KG-10 | 15 | 0.8 | Nonsectarian |
| Robert B Jolicoer School | 17.6 |
Special education | 3-12 | 154 | 9.6 | Nonsectarian |
| Victory Baptist School | 17.9 |
Regular elementary or secondary | Pre-KG-12 | 75 | 9.4 | Baptist |
| Mount Zion Christian Schools | 19.2 |
Regular elementary or secondary | Pre-KG-12 | 152 | 8.9 | Christian (no specific denomination) |
| The Derryfield School | 19.3 |
Regular elementary or secondary | 6-12 | 383 | 9.2 | Nonsectarian |
| Pine Haven Boys Center | 19.9 |
Special education | Ungraded-Ungraded | 18 | 3.5 | Nonsectarian |
| Tri-city Christian Academy | 21.0 |
Regular elementary or secondary | Pre-KG-12 | 284 | 18.9 | Other |
| Strafford Learning Center | 21.2 |
Special education | 1-9 | 26 | 4.6 | Nonsectarian |
| Somersworth Christian Education | 21.8 |
Regular elementary or secondary | Pre-KG-10 | 18 | 4.5 | Pentecostal |
| Tabernacle Christian School | 22.0 |
Regular elementary or secondary | Pre-KG-12 | 117 | 7.8 | Baptist |
| Lighthouse Christian Academy | 22.3 |
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 |
