Schools
| Name | Years | Students |
|---|---|---|
| Kearny | 10 | 19 |
| Kent Place | 1 | 1 |
| Keyport | 4 | 4 |
| King's Christian | 8 | 11 |
| Kingsway Regional | 9 | 16 |
| Kinnelon | 48 | 100 |
| Kittatinny Regional | 42 | 176 |
| Lacey Township | 5 | 7 |
| Lacordaire, Montclair | 1 | 1 |
| Lakeland Regional | 15 | 39 |
| Lakewood High School | 10 | 20 |
| Lambertville | 1 | 1 |
| Lawrence | 13 | 21 |
| Lawrence Township | 2 | 4 |
| Lenape Regional, Medford | 37 | 77 |
| Lenape Valley Regional | 32 | 71 |
| Leonia | 29 | 55 |
| Levittown | 3 | 7 |
| Lincoln, Jersey City | 4 | 8 |
| Linden | 22 | 62 |