Schools
| Name | Years | Students |
|---|---|---|
| Scotch Plains-Fanwood | 61 | 345 |
| Scott, East Orange | 1 | 1 |
| Seabrook | 2 | 3 |
| Secaucus HS | 0 | 0 |
| Seneca | 2 | 3 |
| Seton Hall Prep | 1 | 1 |
| Shawnee | 32 | 72 |
| Shore Regional | 6 | 8 |
| Short Hills | 1 | 4 |
| Sicklerville | 1 | 1 |
| Snyder, Jersey City | 3 | 5 |
| Somerdale | 2 | 2 |
| Somers Point | 2 | 2 |
| Somerville | 50 | 177 |
| South Brunswick | 25 | 67 |
| South Hunterdon | 14 | 19 |
| South Orange | 1 | 4 |
| South Plainfield | 31 | 110 |
| South River | 13 | 34 |
| South Side, Newark | 9 | 21 |