Montclair State University (MSU) is a public research university in Montclair, New Jersey, with parts of the campus extending into Clifton and into Little Falls. As of fall 2018, Montclair State was, by enrollment, the second largest public university in New Jersey. As of November 2021, there were 21,005 total enrolled students: 16,374 undergraduate students and 4,631 graduate students. It is classified among "R2: Doctoral Universities – High research activity". The campus covers approximately 252 acres (1.02 km2). The university offers more than 300 majors, minors, and concentrations.

Montclair is a township in Essex County in the U.S. state of New Jersey. Situated on the cliffs of the Watchung Mountains, Montclair is a commercial and cultural hub of North Jersey and a diverse bedroom community of New York City within the New York metropolitan area. The township is the home of Montclair State University, the state's second-largest university.