South County Area Public Libraries
- Chula Vista Public Library --&-- Online Catalog
- Coronado Public Library --&-- Online Catalog
- National City Public Library --&-- Online Catalog
- San Diego City Public Library --&-- Online Catalog
- San Diego County Library --&-- Online Catalog
- San Diego County Public Law Library --&-- Online Catalog
San Diego Area Academic Libraries
- San Diego State University Library --&-- Online Catalog (the PAC)
- UCSD Libraries --&-- Online Catalog (Roger)
- USD Library --&-- Online Catalog (SALLY)
- The San Diego Circuit: --&-- Online Catalog
The San Diego Circuit is a service designed to allow library users from participating libraries to quickly borrow books from other San Diego Circuit libraries. Member libraries include; San Diego State University, University of California at San Diego, University of San Diego, California State University at San Marcos and both the San Diego County and San Diego City public library systems.
- National University Library --&-- Online Catalog
- California Community College Library Directory and Websites
- California Digital Library
- California State University Libraries
- California Libraries Catalog includes the holdings of all participating California libraries
- California State Library --&-- Online Catalog
- University of California Libraries --&-- Online Catalog (Melvyl) combined holdings of the University of California libraries.
National & International
- Digital Public Library of America a single point of access to millions of items—photographs, manuscripts, books, sounds, moving images, and more.
- Library of Congress --&-- Online Catalog
- LibWeb: A Library Index - a directory of more than 18,000 library websites and web-based catalogs worldwide.
- Libraries.org - a directory of libraries worldwide.
- National Library Websites National libraries are responsible for collecting all publications issued in their respective countries.
- Worldcat - a global catalog of library collections. Search many libraries at once for an item and then locate it in a library nearby.