Schools
| Name | Years | Students |
|---|---|---|
| Nutley | 46 | 102 |
| Nutley | 1 | 1 |
| OCVTS Performing Arts School | 1 | 2 |
| Oakcrest | 20 | 28 |
| Oaklyn | 2 | 5 |
| Ocean | 1 | 2 |
| Ocean City | 26 | 89 |
| Ocean Township | 17 | 40 |
| Old Bridge | 2 | 3 |
| Oradell | 2 | 2 |
| Orange | 4 | 11 |
| Our Lady of Mercy | 4 | 5 |
| Our Lady of the Valley | 1 | 1 |
| Overbrook Regional | 34 | 110 |
| Palisades Park | 3 | 3 |
| Palmyra | 9 | 17 |
| Paramus | 23 | 48 |
| Park Ridge | 10 | 12 |
| Parsippany | 24 | 40 |
| Parsippany Christian | 1 | 1 |