The Rancho Santa Margarita Library is one of 33 branches in the OC Public Libraries network. It serves the city of Rancho Santa Margarita and the unincorporated Coto de Caza area. The RSM library was remodeled in early 2010, as a part of OC Public Libraries' ongoing capital improvements program, with financial assistance from the non-profit Friends of the Library organization.
The library offers a wide selection of books, audiobooks, magazines and DVDs that are available for patrons to check out. Additionally, eBooks and eAudiobooks can be checked out and downloaded to various devices through the website provided.
The library hosts Toddler, Preschool and Spanish storytimes as well as teen programs and the annual Summer Reading Program every July. Family Night and craft events are also held periodically throughout the year. Readers' Cafe offers a place for adult readers to discuss their favorite books. The International Film Series screen world films on the third Friday of the month at 7pm.
The library includes a Quiet Room and Community Room, which can be reserved by non-profit groups and community organizations as available. The RSM library is also home to the Rancho Santa Margarita Friends of the Library bookstore.
The Rancho Santa Margarita Historical Society meets in the Quiet Room of the library on the third Wednesday of the month at 6:15pm.