- U.C. Cooperative Extension. Monterey County. Collection. (D-276)
- Uehara, Masa. Collection. (D-366)
- Uhl, E.H. Collection. (MC026)
- Ullman, Russell. Collection. (D-144)
- Underground Comic Book Collection. (D-045)
- United Committee on War Temperance Activities in the Army and Navy Lantern Slides (D-467)
- United Committee on War Temperance Activities in the Army and Navy Lantern Slides (D-467)
- United States. General Land Office. Archives. (D-188)
- Universal Movement Theatre Repertory Archives. (D-145)
- University of California (System). Center for Cooperatives. Collection. (D-395)
- Ury, Marian. Papers. (D-172)
- USSR Theatre Collection. (D-137)
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