Join or Renew Your Membership

To submit a new membership request, or to renew an existing membership, use either of the following methods:

  • Click here to use our automated Square membership (and donation) portal
  • Complete the online application form. Use Adobe Reader to fill out the form online and then print it, or print the blank form and fill it out by hand. Return the completed form and your membership dues by mail to:
           Friends of the Castro Valley Library
           3600 Norbridge Avenue
           Castro Valley, CA 94546

To determine the type of membership and cost, review the Membership Benefits list (PDF).

When you provide your email address, you greatly benefit the Friends since we can: 

  • Reduce postage costs
  • Reduce volunteer time required to prepare and mail newsletters
  • Reduce time required to communicate to members  

If we do not have your email address, we will send your Friends newsletter and other communications by U.S. mail. 

Add This email address is being protected from spambots. You need JavaScript enabled to view it. to your email contacts or address book so that our newsletter and other communications do not get routed to your SPAM/reject folder.

If you have any questions about memberships, please call (510) 733-3285 or This email address is being protected from spambots. You need JavaScript enabled to view it.us for more information.