California State University, San Marcos is a public university in San Marcos, California. It was founded in 1989 as the 21st campus in the California State University system. CSUSM offers 43 bachelor's degree programs, 23 master's degree programs, an Ed. D. program, and 13 teaching credentials. CSUSM is accredited by the Western Association of Schools and Colleges. The university had a total undergraduate enrollment of 12,917 students in fall 2022.