Sonoma State University (SSU, Sonoma State, and Sonoma) is a public comprehensive university, part of the 23-campus California State University (CSU) system. The main campus is located east of Rohnert Park, California, United States, approximately 10 miles (16 km) south of Santa Rosa and 50 miles (80 km) north of San Francisco. The university is one of the smallest of the 23 CSU campuses in California.