Collection includes CSUSM telephone directories, directories, directory updates, and marginalia for California State University San Marcos. Additionally, collection contains supplemental college directories for select years.

The California State University San Marcos University Library oral histories collection consists of oral histories collected by the university through various means, starting in 1989 and continuing to present day. Oral histories include interviews of campus and community members relevant to our service region (north San Diego County, southwestern Riverside County, and to a limited extent the rest of San Diego County.

The Cross-Cultural Center records document the creation and operations of California State University San Marcos's longest running social justice center at CSUSM. Additionally, the records document activities related to various other campus units and organizations, including student orgranizations.