| School Name | Grades | Address | Zip | Phone | County | Type | District Name |
| Battle Hill Elementary School | PK-4 | 2600 Killian Place
Union, NJ | 07083 | (908) 851-6480 | Union | public | Union Township School District |
| Burnet Middle School | 6-8 | 1000 Caldwell Avenue
Union, NJ | 07083 | (908) 851-6490 | Union | public | Union Township School District |
| Central Five-Jefferson Elementary School | 5 | 155 Hilton Avenue
Union, NJ | 07083 | (908) 851-6560 | Union | public | Union Township School District |
| Connecticut Farms Elementary School | PK-4 | 875 Stuyvesant Avenue
Union, NJ | 07083 | (908) 851-6470 | Union | public | Union Township School District |
| Deron School I | n/a | 1140 Commerce Ave
Union, NJ | 07083 | (908) 206-0444 | Union | private | |
| Developmental Learning Center - Union | n/a | 1231 Burnett Avenue
Union, NJ | 07083 | (908) 810-1501 | Union | public | Morris-Union Jointure Commission School District |
| Franklin Elementary School | PK-4 | 1500 Lindy Terrace
Union, NJ | 07083 | (908) 851-6450 | Union | public | Union Township School District |
| Hannah Caldwell Elementary School | PK-4 | 1120 Commerce Avenue
Union, NJ | 07083 | (908) 206-6101 | Union | public | Union Township School District |
| Holy Spirit School | PK-8 | 970 Suburban Rd
Union, NJ | 07083 | (908) 687-8415 | Union | private | |
| Kawameeh Middle School | 6-8 | 490 David Terrace
Union, NJ | 07083 | (908) 851-6570 | Union | public | Union Township School District |
| Livingston Elementary School | PK-4 | Midland Blvd
Union, NJ | 07083 | (908) 851-6440 | Union | public | Union Township School District |
| St. Michael Parish School | PK-8 | 1212 Kelly Street
Union, NJ | 07083 | (908) 688-1063 | Union | private | |
| The Jardine Academy | n/a | 373 Clermont Ter
Union, NJ | 07083 | (908) 354-5800 | Union | private | |
| Union Senior High School | 9-12 | 2350 North Third Street
Union, NJ | 07083 | (908) 851-6500 | Union | public | Union Township School District |
| Washington Elementary School | PK-4 | 301 Washington Avenue
Union, NJ | 07083 | (908) 851-6460 | Union | public | Union Township School District |
