The MUJC's 30 member school districts and their respective superintendents are listed below:

• Berkeley Heights (Dr. Melissa Varley)
• Bernards Township (Mr. Nick Markarian)
• School District of the Chathams (Dr. Michael LaSusa)
• Clark  (Mr. Edward Grande)
• Clinton Township  (Dr. Melissa Stager, Superintendent)
• Cranford  (Dr. Scott Rubin)
• Florham Park  (Dr. Steven Caponegro)
• Harding Township  (Dr. Matthew Spelker)
• Kenilworth  (Mr. Kyle Arlington)
• Livingston (Dr. Matthew Block)
• Long Hill Township (Dr. Anne Mucci)
• Madison (Mr. Mark Schwarz)
• Mendham Township (Dr. Salvatore Constantino)
• Millburn (Dr. Christine Burton)
• Montville Township (Dr. Thomas Gorman)
• Mountainside (Ms. Janet Walling)
• New Providence (Dr. David Miceli)
• Parsippany-Troy Hills Township (Dr. Barbara Sargent)
• Roselle Park (Mr. Pedro Garrido)
• Somerset Hills (Dr. Gretchen Dempsey)
• School District of South Orange/Maplewood (Dr. Ronald Taylor)
• Scotch Plains - Fanwood (Dr. Joan Mast)
• Springfield (Dr. Rachel Goldberg)
• Summit (Mr. Scott Hough)
  
• Union Township (Dr. Scott Taylor)
• Warren Township (Dr. Matthew Mingle)
• Watchung Borough (Mr. George Alexis)
• Watchung Hills Regional High School (Dr. Elizabeth Jewett)
• West Orange  (Dr. C. Lauren Schoen, Interim Superintendent)
• Westfield (Dr. Raymond Gonzalez)