| Daytop Preparatory School | 6.8 |
Regular elementary or secondary | 9-12 | 30 | 2.8 | Nonsectarian |
| Hunterdon Learning Center | 7.8 |
Special education | 7-12 | 80 | 6.7 | Nonsectarian |
| Immaculata High School | 10.7 |
Regular elementary or secondary | 9-12 | 814 | 13.4 | Roman Catholic |
| Delbarton School | 11.2 |
Regular elementary or secondary | 7-12 | 542 | 7.0 | Roman Catholic |
| Villa Walsh Academy | 11.7 |
Regular elementary or secondary | 7-12 | 248 | 9.5 | Roman Catholic |
| Shepard High School | 13.7 |
Special education | 8-12 | 122 | 6.7 | Nonsectarian |
| Green Brook Academy | 14.0 |
Special education | 7-12 | 57 | 5.9 | Nonsectarian |
| Academy Of Saint Elizabeth | 14.9 |
Regular elementary or secondary | 9-12 | 244 | 9.5 | Roman Catholic |
| High Road School At Somerset | 15.5 |
Special education | 7-12 | 129 | 6.6 | Nonsectarian |
| Mt St Mary Academy (high School) | 16.7 |
Regular elementary or secondary | 9-12 | 381 | 9.7 | Roman Catholic |
| East Mountain School | 17.3 |
Special education | 7-12 | 118 | 5.1 | Nonsectarian |
| Morris Catholic High School | 17.7 |
Regular elementary or secondary | 9-12 | 502 | 15.4 | Roman Catholic |
| Oratory Preparatory School | 18.2 |
Regular elementary or secondary | 7-12 | 279 | 8.1 | Roman Catholic |
| Union Catholic Regional High S | 19.8 |
Regular elementary or secondary | 9-12 | 802 | 15.9 | Roman Catholic |
| Bishop George Ahr High School | 20.3 |
Regular elementary or secondary | 9-12 | 913 | 15.7 | Roman Catholic |
| Sage Day School At Somerset | 20.6 |
Special education | 9-12 | 38 | 3.6 | Nonsectarian |
| Cornerstone Day School | 21.1 |
Special education | 7-12 | 42 | 8.4 | Nonsectarian |
| St Joseph High School | 21.4 |
Regular elementary or secondary | 9-12 | 833 | 14.6 | Roman Catholic |
| Pope John Xxiii High School | 22.2 |
Regular elementary or secondary | 9-12 | 938 | 12.9 | Roman Catholic |
| Mother Seton Regional High School | 22.6 |
Regular elementary or secondary | 9-12 | 419 | 15.6 | Roman Catholic |
| The Milton School | 22.9 |
Special education | 8-12 | 36 | 6.0 | Nonsectarian |
| Essex Valley School | 23.6 |
Special education | 7-12 | 63 | 6.3 | Nonsectarian |
| Roselle Catholic High School | 24.2 |
Regular elementary or secondary | 9-12 | 678 | 15.6 | Roman Catholic |
| Veritas Christian Academy | 24.5 |
Regular elementary or secondary | 9-11 | 39 | 6.2 | Christian (no specific denomination) |
| Marylawn Of The Oranges Academy | 24.6 |
Regular elementary or secondary | 9-12 | 197 | 10.2 | Roman Catholic |
| Seton Hall Preparatory School | 25.0 |
Regular elementary or secondary | 9-12 | 972 | 13.4 | Roman Catholic |
