A global library resource
Like the knowledge it describes, WorldCat grows steadily every day from the contributions of member libraries in the OCLC cooperative.
When you contribute library data to WorldCat, you help grow the world’s largest and most comprehensive catalog of library resources from around the world, with more than 305 million bibliographic records that represent more than 2 billion items held by participating libraries.
WorldCat facts and statistics
Number of libraries represented worldwide
Number of holdings
Every 10 seconds
How often a record is added
Number of languages and dialects represented
Number of bibliographic records
Countries and territories with library holdings in WorldCat