The Serra Cooperative Library System is a network of public libraries in the southern California counties of Imperial and San Diego. Our goal is to work collaboratively with each other to provide materials and shared services when possible. Serra is a special district of the State of California, with funding primarily from the State, but augmented through member contributions and grants. The purpose of the Serra Cooperative Library System is to help member library agencies provide improved services at reduced costs through systematic interlibrary cooperation.

Serra is one of 9 California library consortiums established by the California Library Services Act (CLSA) for the purpose of providing collaborative reference, communication and delivery services, staff development training and grant administration for the diverse public libraries in the area.

Serra libraries worked together to purchase a subscription to Flipster, Overdrive, and LINK+. By purchasing the subscriptions as a group, all libraries benefit from discounted pricing and easier management of the subscriptions.