California State University San Marcos (CSUSM or Cal State San Marcos) is a public comprehensive university in San Marcos, California, United States, and one of the 23 campuses of the California State University system. It was founded in 1989 as the 20th CSU campus. The first class was admitted in 1990. Building on an innovative 27-year history, California State University San Marcos is a forward-focused institution, dedicated to preparing future leaders, building great communities and solving critical issues.
Located in North San Diego County, in between the city of San Diego to the south, and Orange and Riverside counties to the north, Cal State San Marcos’ unique location offers endless opportunities for exploration and activities. Minutes from the area’s best beaches and an hour from both the desert and the mountains; discover the sights near our vibrant campus in the idyllic foothills of San Marcos.