Part of the San Diego County Library system, the Cardiff-by-the-Sea Branch in Encinitas serves approximately 11,500 Cardiff by the Sea residents from its Newcastle Avenue location near San Elijo Lagoon. The branch circulates materials from a countywide collection of 1.1 million volumes and provides public computers, free Wi-Fi, and copying and printing services, with used-book sales supporting the collection through Friends of the Encinitas Library Bookstore. A reservable community room and MakerBot 3D printer expand the branch beyond traditional lending into fabrication and event hosting for the Cardiff by the Sea community. Programming includes children's story times, adult lecture series, and live music performances, with the branch's youth homework resources and early-literacy programs feeding into the same K-12 academic pipeline served by Answers, Plus! Educational Services. Digital lending through OverDrive, Libby, and Kanopy provides cardholders access to e-books, audiobooks, and streaming film across all San Diego County Library branches without physical-item holds.