Schools
| Name | Years | Students |
|---|---|---|
| Jonathan Dayton Regional, Springfield | 16 | 49 |
| Jonathan Dayton Regional | 1 | 5 |
| Johnson Regional | 2 | 6 |
| John F. Kennedy | 14 | 37 |
| Jersey City, Lincoln | 1 | 1 |
| Jersey City, Ferris | 1 | 6 |
| Jersey City | 5 | 59 |
| Jefferson, Elizabeth | 1 | 1 |
| Jefferson Township | 26 | 69 |
| Jamestown | 1 | 1 |
| Jamesburg | 3 | 4 |
| James Caldwell | 28 | 61 |
| Jackson Memorial | 26 | 54 |
| Jackson Liberty HS | 1 | 1 |
| J.P. Stevens | 49 | 415 |
| J.F.K. Memorial | 10 | 22 |
| J.F. Kennedy-Willingboro | 5 | 6 |
| Irvington | 4 | 8 |
| Iona | 1 | 1 |
| Indian Hills | 20 | 60 |