| Jackson Avenue | HACKENSACK | Public school | PK–4 | 0 |
| Jackson Township 5-6 School | Jackson | Public school | 5–6 | 0 |
| Jackson Township High School | Jackson | Public school | 9–12 | 0 |
| Jackson Township Middle School | Jackson | Public school | 7–8 | 0 |
| James A Cotten Intermediate School | Willingboro | Public school | 5–6 | 0 |
| James A. Garfield Elementary School | COLLINGSWOOD | Public school | K–5 | 0 |
| James A. McDivitt Elementary School | OLD BRIDGE | Public school | K–5 | 0 |
| James Caldwell Elementary School | Springfield | Public school | PK–4 | 0 |
| James Caldwell High School | WEST CALDWELL | Public school | 9–12 | 0 |
| James F. Cooper Elementary School | CHERRY HILL | Public school | K–5 | 0 |
| James F. Murray School | JERSEY CITY | Public school | PK–8 | 0 |
| James Fallon Elementary School | WAYNE | Public school | K–5 | 0 |
| James J Ferris High School | JERSEY CITY | Public school | 9–12 | 0 |
| James J. Flynn Elementary School | PERTH AMBOY | Public school | K–5 | 0 |
| James Johnson Elementary School | CHERRY HILL | Public school | K–5 | 0 |
| James Madison Intermediate School | EDISON | Public school | 3–5 | 0 |
| James Madison Primary School | EDISON | Public school | K–2 | 0 |
| James Madison School #10 | GARFIELD | Public school | PK–5 | 0 |
| James Monroe Elementary School | Edison | Public school | K–5 | 0 |
| James Russell Lowell Elementary School | TEANECK | Public school | K–4 | 0 |
| James W. Lilley Elementary School | ERIAL | Public school | K–5 | 0 |
| Janis E. Dismus Middle School | ENGLEWOOD | Public school | 7–8 | 0 |
| Jefferson (Annex) Elementary School | WALLINGTON | Public school | K–2 | 0 |
| Jefferson Elementary | UNION | Public school | 5–6 | 0 |
| Jefferson Elementary School | BERGENFIELD | Public school | K–5 | 0 |
| Jefferson Elementary School | WEST CALDWELL | Public school | K–5 | 0 |
| Jefferson Elementary School | SUCCASUNNA | Public school | PK–4 | 0 |
| Jefferson Elementary School | SUMMIT | Public school | 1–5 | 0 |
| Jefferson Elementary School | Westfield | Public school | 1–5 | 0 |
| Jefferson Elementary School | PLAINFIELD | Public school | PK–5 | 0 |
| Jefferson Elementary School | UNION CITY | Public school | PK–4 | 0 |
| Jefferson School | LYNDHURST | Public school | 3–5 | 0 |
| Jefferson Township High School | OAK RIDGE | Public school | 9–12 | 0 |
| Jefferson Township Intermediate School | OAK RIDGE | Public school | 4–8 | 0 |
| Jeffrey Clark School | MICKLETON | Public school | PK–2 | 0 |
| Jerome Dunn Academy No 9 | Elizabeth | Public school | K–8 | 0 |
| Jersey City Community Charter School | JERSEY CITY | Public school | K–8 | 0 |
| Jersey City Global Charter School | Jersey City | Public school | K–8 | 0 |
| Jersey City Golden Door Charter School | JERSEY CITY | Public school | PK–8 | 0 |
| Jessie F. George Elementary | TOWNSHIP OF WASHINGTON | Public school | K–5 | 0 |
| John A. Carusi Middle School | CHERRY HILL | Public school | 6–8 | 0 |
| John A. Forrest Elementary School | FAIR LAWN | Public school | K–4 | 0 |
| John Adams | NORTH BRUNSWICK | Public school | PK–4 | 0 |
| John Adams Middle School | EDISON | Public school | 6–8 | 0 |
| John Brainerd Elementary School | MOUNT HOLLY | Public school | PK–1 | 0 |
| John C. Milanesi Elementary School | BUENA | Public school | PK–2 | 0 |
| John E. Dwyer Technology Academy | Elizabeth | Public school | 9–12 | 0 |
| John E. Riley Elementary School | South Plainfield | Public school | K–4 | 0 |
| John F. Kennedy Elementary School | WAYNE | Public school | K–5 | 0 |
| John F Kennedy Elementary School | SOUTH PLAINFIELD | Public school | K–4 | 0 |