The Watchung Conference was a high school sports association under the jurisdiction of the New Jersey State Interscholastic Athletic Association (NJSIAA). The conference consisted of eleven public high schools covering Essex County, Hudson County and Union County in northern New Jersey. In 2009, the conference was disbanded. The Essex County schools joined the Super Essex Conference, the Union County schools joined the Union County Interscholastic Athletic Association, and the Hudson County schools joined the temporary North Jersey Tri-County Conference, before joining their Hudson County schools in reviving the Hudson County Interscholastic Athletic Association in 2010.
| School | Location | School District | Team Name |
| Cranford High school | Cranford | Cranford Township Public Schools | Cougars |
| East Side High School | Newark | Newark Public Schools | Red Raiders |
| Elizabeth High School | Elizabeth | Elizabeth Public Schools | Minutemen |
| Irvington High School | Irvington | Irvington Public Schools | Knights |
| Kearny High School | Kearny | Kearny School District | Kardinals |
| Linden High School | Linden | Linden Public Schools | Tigers |
| Plainfield High School | Plainfield | Plainfield Public School District | Cardinals |
| Scotch Plains-Fanwood High School | Scotch Plains | Scotch Plains-Fanwood Regional School District | Raiders |
| Malcolm X Shabazz High School | Newark | Newark Public Schools | Bulldogs |
| Union High School | Union Township | Union Public School District | Farmers |
| Westfield High School | Westfield | Westfield Public Schools | Blue Devils |