Schools
| Name | Years | Students |
|---|---|---|
| Southern Regional, Manahawkin | 2 | 2 |
| Sparta | 36 | 99 |
| Spotswood | 7 | 12 |
| Spring Lake | 1 | 1 |
| Springfield | 5 | 11 |
| St. Augustine Prep | 7 | 13 |
| St. Benedict's, Newark | 11 | 37 |
| St. Mary's | 3 | 4 |
| St. Peters | 5 | 6 |
| Steinert | 11 | 22 |
| Steinert, Trenton | 1 | 1 |
| Sterling Regional, Somerdale | 20 | 27 |
| Stewartsville | 1 | 1 |
| Stuart County Day School | 2 | 2 |
| Summit | 58 | 222 |
| Teaneck | 26 | 99 |
| Tenafly | 43 | 143 |
| Tenafly | 1 | 2 |
| Thomas Jefferson, Elizabeth | 6 | 14 |
| Timber Creek HS | 2 | 2 |