| Montessori Country Day School | 2.2 |
Montessori | Ungraded-Ungraded | 100 | 10.0 | Nonsectarian |
| The Hun School Of Princeton | 2.7 |
Regular elementary or secondary | 6-12 | 579 | 8.2 | Nonsectarian |
| Princeton Day School | 3.4 |
Regular elementary or secondary | Pre-KG-12 | 888 | 7.9 | Nonsectarian |
| Noor-ul-iman School | 4.8 |
Regular elementary or secondary | Pre-KG-12 | 399 | 9.8 | Islamic |
| Princeton Child Development Institute | 5.3 |
Special education | Ungraded-Ungraded | 29 | 3.6 | Nonsectarian |
| Rock Brook School Inc | 5.8 |
Special education | Ungraded-Ungraded | 50 | 4.3 | Nonsectarian |
| The Bridge Academy | 6.8 |
Special education | Ungraded-Ungraded | 63 | 3.8 | Nonsectarian |
| The Pennington School | 8.5 |
Regular elementary or secondary | 6-12 | 473 | 6.2 | Methodist |
| Trenton Catholic School | 9.3 |
Regular elementary or secondary | KG-12 | 493 | 10.0 | Roman Catholic |
| Newgrange School | 9.7 |
Special education | 2-12 | 108 | 3.4 | Nonsectarian |
| Newgrange School & Educational Outreach Ctr | 9.7 |
Special education | 2-12 | 105 | 2.3 | Nonsectarian |
| The Studio For Experiential Learning | 10.2 |
Alternative/other | 3-12 | 12 | 2.8 | Nonsectarian |
| Sr Georgine School | 10.5 |
Special education | Ungraded-Ungraded | 16 | 3.2 | Nonsectarian |
| The Garvey School | 10.7 |
Regular elementary or secondary | Pre-KG-11 | 35 | 4.1 | Nonsectarian |
| Delaware Valley School For Exceptional Children | 11.1 |
Special education | Ungraded-Ungraded | 24 | 6.0 | Nonsectarian |
| Villa Victoria Academy | 12.5 |
Regular elementary or secondary | KG-12 | 213 | 7.9 | Roman Catholic |
| The Titusville Academy | 13.1 |
Special education | 1-12 | 86 | 7.8 | Nonsectarian |
| Hunterdon Christian Academy | 14.3 |
Regular elementary or secondary | Pre-KG-12 | 70 | 8.0 | Christian (no specific denomination) |
| Jerry Davis Early Childhood Center | 14.4 |
Special education | Pre-KG-Pre-KG | 8 | 8.0 | Nonsectarian |
| Meadow View Junior Academy | 14.6 |
Regular elementary or secondary | Pre-KG-10 | 62 | 10.3 | Seventh-Day Adventist |
| Somerset Bible Baptist Christian Academy | 14.9 |
Regular elementary or secondary | KG-12 | 45 | 9.0 | Christian (no specific denomination) |
| Rutgers Preparatory School | 14.9 |
Regular elementary or secondary | Pre-KG-12 | 687 | 6.7 | Nonsectarian |
| Darul Arqam School | 15.4 |
Special program emphasis | Pre-KG-11 | 231 | 8.1 | Islamic |
| Center School | 15.7 |
Regular elementary or secondary | 1-12 | 135 | 5.9 | Nonsectarian |
| Netivot Motessori Mesorah | 16.8 |
Montessori | Ungraded-Ungraded | 65 | 21.7 | Jewish |
| An Noor Academy | 17.2 |
Regular elementary or secondary | Pre-KG-12 | 289 | 9.6 | Islamic |
| An-noor Academy | 17.2 |
Regular elementary or secondary | KG-12 | 289 | 8.3 | Islamic |
| Center For Educ Advancement-spring Run School | 17.8 |
Special education | Ungraded-Ungraded | 32 | 8.9 | Nonsectarian |
| Timothy Christian School | 17.8 |
Regular elementary or secondary | KG-12 | 605 | 12.8 | Baptist |
| The Midland School | 18.2 |
Special education | Ungraded-Ungraded | 244 | 6.4 | Nonsectarian |
| The Pingry School | 19.6 |
Regular elementary or secondary | KG-12 | 1053 | 6.8 | Nonsectarian |
| Life Center Academy | 19.6 |
Regular elementary or secondary | Pre-KG-12 | 310 | 13.8 | Assembly of God |
| The Patriots Academy | 19.8 |
Regular elementary or secondary | KG-12 | 9 | 1.7 | Pentecostal |
| Cpc High Point Schools | 20.3 |
Special education | Ungraded-Ungraded | 197 | 5.6 | Nonsectarian |
| New Life Christian School | 20.4 |
Regular elementary or secondary | Pre-KG-9 | 43 | 14.3 | Christian (no specific denomination) |
| Coastal Learning Center Morganville | 20.6 |
Special education | 2-12 | 78 | 7.1 | Nonsectarian |
| Somerset Hills School | 21.1 |
Special education | Ungraded-Ungraded | 110 | 4.2 | Nonsectarian |
| Lakeview School | 21.4 |
Special education | Pre-KG-Pre-KG | 157 | 6.5 | Nonsectarian |
| Somerset Hills Learning Institute | 21.4 |
Special education | Ungraded-Ungraded | 21 | 2.3 | Nonsectarian |
| St Mary's Hall - Doane Academy | 21.7 |
Regular elementary or secondary | Pre-KG-12 | 193 | 6.1 | Episcopal |
| Wardlaw-hartridge School | 22.3 |
Regular elementary or secondary | Pre-KG-12 | 402 | 7.2 | Nonsectarian |
| Bonnie Brae School | 22.8 |
Special education | 3-12 | 75 | 4.1 | Nonsectarian |
| Maranatha Christian Academy | 23.9 |
Regular elementary or secondary | 1-12 | 26 | 26.0 | Baptist |
| Mcauley School | 24.2 |
Special education | Ungraded-Ungraded | 44 | 5.5 | Nonsectarian |
| Children's Specialized Hospital/school Program | 24.9 |
Special education | Ungraded-Ungraded | 32 | 6.4 | Nonsectarian |
