California State University, East Bay is a public university in Hayward, California, United States. The university is part of the California State University system and offers 136 undergraduate and 60 post-baccalaureate areas of study. Founded in 1957, California State University, East Bay had a student body of approximately 11,544 as of Spring 2025. As of Fall 2024, it had 760 faculty. The university's largest and oldest college campus is located in Hayward, with additional centers in the nearby cities of Oakland and Concord.