California State University, Northridge, is a public university in the Northridge neighborhood of Los Angeles, California, United States. With a total enrollment of 38,551 students, it has the second largest undergraduate population as well as the third largest total student body in the California State University system, making it one of the largest comprehensive universities in the United States in terms of enrollment size. The size of CSUN also has a major impact on the California economy, with an estimated $1.9 billion in economic output generated by CSUN on a yearly basis. As of Fall 2021, the university had 2,187 faculty, of which 794 were tenured or on the tenure track.

Northridge is a neighborhood in the San Fernando Valley region of the City of Los Angeles. The community is home to California State University, Northridge, and the Northridge Fashion Center.