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    • Phone Number: (858) 673.4697
      Address: 4S Commons – 10433 Reserve Drive, 92127
      Website: http://www.sdcl.org/locations_4S.html
      Monday 9:30 AM to 6:00 PM
      Tuesday 9:30 AM to 8:00 PM
      Wednesday 9:30 AM to 8:00 PM
      Thursday 9:30 AM to 6:00 PM
      Friday 9:30 AM to 5:00 PM
      Saturday 9:30 AM to 5:00 PM
      Sunday        C L O S E D

      Library Info & Links 

      4S Branch Calendar of Events  

      4S Friends of the Library Friends of the Library groups support libraries in many ways. A Founders group is now forming in 4S Ranch. All interested community members please email or call Mary Karscig at shmrok5@cox.net or 858.759.4599. 

      San Diego County Library Home Search Library Catalog, Request a Book Transfer, Renew Your Account & More 

      How Can I Help to Support the 4S Library Branch? There are many ways that you can support our library’s mission to Inform, Educate, Inspire, and Entertain our community. You can help by volunteering your time, making a monetary donation, or simply thinking of us when you do your shopping. Click the link above for some details – and thanks for your support!