SCLC (Southern California Library Cooperative) is an association of 32 independent city and special district public libraries located in the greater Los Angeles area which have agreed to cooperate in providing library service to the residents of all participating jurisdictions. SCLC provides member libraries a resource-sharing network and a means for enhancing the level and diversity of resources available to library users, while reducing duplication of effort.

SCLC members extend, on an equal basis, loan privileges to residents of other member libraries. The SCLC Reference Center provides a vital link for reference referral to members, enabling them to provide answers to difficult questions without purchasing the range of expensive resources required for in-depth research. And the System's delivery service links members for quick transfer of materials and enhanced sharing of resources.