**A free service for all libraries and consortia** helping to raise the visibility of libraries on behalf of the OCLC membership and the library community

Maintain a single profile where you store information about your institutional identity, online services, relationships, contacts and more. Share that profile with partners, developers and others who want accurate information about your library. Learn more »

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NEW! Want to create, update or share a Registry profile?

This site provides only search and display of public WorldCat Registry information. To manage and share your existing institutional profile or to create a new profile, go to OCLC Service Configuration. Sign in using the same user account and password you used previously for the WorldCat Registry, or create a new account.

For developers

WorldCat Registry-based Web services help you:

Power "library lookup" functionality in Web sites, mobile apps and more, using the WorldCat Registry API
Link your users to full-text articles and other online resources owned by libraries with the OpenURL Gateway

For consortium managers

WorldCat Registry lets you simplify the administration of your group and the sharing of configuration data. Learn more »

For content and service vendors

WorldCat Registry provides unambiguous identification of institutions and a single source of up-to-date customer data. Learn more »