|The California State University (Cal State or CSU) is a public university system in California. With 23 campuses and eight off-campus centers enrolling 484,300 students with 26,858 faculty and 25,305 staff, CSU is the largest four-year public university system in the United States. It is one of three public higher education systems in the state, with the other two being the University of California system and the California Community Colleges System. The CSU System is incorporated as The Trustees of the California State University. The California State University system headquarters are at 401 Golden Shore in Long Beach, California.