| The Midland School | 9.5 |
Special education | Ungraded-Ungraded | 244 | 6.4 | Nonsectarian |
| Hunterdon Christian Academy | 11.8 |
Regular elementary or secondary | Pre-KG-12 | 70 | 8.0 | Christian (no specific denomination) |
| Rock Brook School Inc | 12.8 |
Special education | Ungraded-Ungraded | 50 | 4.3 | Nonsectarian |
| Somerset Hills Learning Institute | 13.4 |
Special education | Ungraded-Ungraded | 21 | 2.3 | Nonsectarian |
| Jerry Davis Early Childhood Center | 14.1 |
Special education | Pre-KG-Pre-KG | 8 | 8.0 | Nonsectarian |
| The Pennington School | 14.3 |
Regular elementary or secondary | 6-12 | 473 | 6.2 | Methodist |
| Princeton Day School | 14.6 |
Regular elementary or secondary | Pre-KG-12 | 888 | 7.9 | Nonsectarian |
| Princeton Child Development Institute | 15.1 |
Special education | Ungraded-Ungraded | 29 | 3.6 | Nonsectarian |
| The Titusville Academy | 15.6 |
Special education | 1-12 | 86 | 7.8 | Nonsectarian |
| The Hun School Of Princeton | 16.0 |
Regular elementary or secondary | 6-12 | 579 | 8.2 | Nonsectarian |
| The Pingry School | 16.4 |
Regular elementary or secondary | KG-12 | 1053 | 6.8 | Nonsectarian |
| Stepping Stone School | 16.5 |
Special education | 1-9 | 37 | 5.3 | Nonsectarian |
| Matheny School | 16.6 |
Special education | Pre-KG-12 | 59 | 5.1 | Nonsectarian |
| Gill St Bernard S School | 17.2 |
Regular elementary or secondary | Pre-KG-12 | 652 | 8.4 | Nonsectarian |
| Montgomery Academy | 17.5 |
Special education | 3-12 | 92 | 6.1 | Nonsectarian |
| Eden Institute | 17.8 |
Special education | Pre-KG-Pre-KG | 46 | 4.6 | Nonsectarian |
| Bonnie Brae School | 17.9 |
Special education | 3-12 | 75 | 4.1 | Nonsectarian |
| Noor-ul-iman School | 17.9 |
Regular elementary or secondary | Pre-KG-12 | 399 | 9.8 | Islamic |
| Somerset Bible Baptist Christian Academy | 18.1 |
Regular elementary or secondary | KG-12 | 45 | 9.0 | Christian (no specific denomination) |
| The Bridge Academy | 18.7 |
Special education | Ungraded-Ungraded | 63 | 3.8 | Nonsectarian |
| Rutgers Preparatory School | 18.8 |
Regular elementary or secondary | Pre-KG-12 | 687 | 6.7 | Nonsectarian |
| The Studio For Experiential Learning | 18.9 |
Alternative/other | 3-12 | 12 | 2.8 | Nonsectarian |
| Villa Victoria Academy | 19.2 |
Regular elementary or secondary | KG-12 | 213 | 7.9 | Roman Catholic |
| Somerset Hills School | 19.5 |
Special education | Ungraded-Ungraded | 110 | 4.2 | Nonsectarian |
| Montessori Country Day School | 19.8 |
Montessori | Ungraded-Ungraded | 100 | 10.0 | Nonsectarian |
| Lord Stirling School | 20.5 |
Special education | Ungraded-Ungraded | 44 | 4.9 | Nonsectarian |
| The Garvey School | 21.9 |
Regular elementary or secondary | Pre-KG-11 | 35 | 4.1 | Nonsectarian |
| New Life Christian School | 22.2 |
Regular elementary or secondary | Pre-KG-9 | 43 | 14.3 | Christian (no specific denomination) |
| Newgrange School | 22.4 |
Special education | 2-12 | 108 | 3.4 | Nonsectarian |
| Newgrange School & Educational Outreach Ctr | 22.4 |
Special education | 2-12 | 105 | 2.3 | Nonsectarian |
| Center School | 22.4 |
Regular elementary or secondary | 1-12 | 135 | 5.9 | Nonsectarian |
| An Noor Academy | 22.4 |
Regular elementary or secondary | Pre-KG-12 | 289 | 9.6 | Islamic |
| An-noor Academy | 22.4 |
Regular elementary or secondary | KG-12 | 289 | 8.3 | Islamic |
| Sr Georgine School | 22.7 |
Special education | Ungraded-Ungraded | 16 | 3.2 | Nonsectarian |
| Trenton Catholic School | 22.7 |
Regular elementary or secondary | KG-12 | 493 | 10.0 | Roman Catholic |
| Timothy Christian School | 23.1 |
Regular elementary or secondary | KG-12 | 605 | 12.8 | Baptist |
| Netivot Motessori Mesorah | 23.8 |
Montessori | Ungraded-Ungraded | 65 | 21.7 | Jewish |
| Mcauley School | 24.5 |
Special education | Ungraded-Ungraded | 44 | 5.5 | Nonsectarian |
| American Christian School | 24.9 |
Regular elementary or secondary | Pre-KG-9 | 120 | 10.2 | Christian (no specific denomination) |
| Delaware Valley School For Exceptional Children | 25.0 |
Special education | Ungraded-Ungraded | 24 | 6.0 | Nonsectarian |
