San Diego Public Libraries
- San Diego Public Library System (SDPL) | Online Catalog
- San Diego County Library System (SDCL) | Online Catalog
- San Diego Law Library | Online Catalog
Academic Libraries: Universities
- San Diego State University Library Website and Online Catalog
- University of California San Diego Libraries Website and Online Catalog
- University of San Diego Library Website and Online Catalog
- California State University San Marcos Library Website and Online Catalog
- San Diego CIRCUIT Consortium Catalog - The Circuit interface allows you to search for and request books from the collections of the SDSU, UCSD, USD, CSUSM, San Diego Public Library system, and San Diego County Library system libraries. Learn more about this free service.
Academic Libraries: Community Colleges
- Cuyamaca College Library Website and Online Catalog
- Grossmont College Library Website and Online Catalog
- Imperial Valley College Library Website and Online Catalog
- MiraCosta College Library Website and Online Catalog
- Palomar College Library Website and Online Catalog
- San Diego City College Library Website and Online Catalog
- San Diego Mesa College Library Website and Online Catalog
- Southwestern College Library Website and Online Catalog
Area Public Libraries
- Carlsbad City Library | Online Catalog
- Chula Vista Public Library | Online Catalog
- Coronado Public Library | Online Catalog
- Escondido Public Library | Online Catalog
- National City Public Library | Online Catalog
- Oceanside Public Library | Online Catalog
Other California Libraries
- California Community College Libraries: Directory
- California Digital Library
- California State Library | Online Catalog
- University of California Libraries | UC Library Search
National & International Libraries
- Library of Congress | Online Catalog
- Libraries.org - Directory of libraries throughout the world
- National Libraries of the World
- WorldCat - Global catalog of library collections