The Mountainside Public Library will be closed to the public effective immediately.


Due dates on items that are already checked out will be delayed until we are reopened, so no late fees will accrue. The drop box is closed, please keep library materials until the library is reopened. 

Please check our website or this Facebook page for updates in the coming days.

Digital Story Time on Zoom! Preschoolers on Thursdays and Baby to Two Years on Tuesdays. Both story times are from 10:00-10:40am. Follow this link to join us!

eBooks and Audiobooks are available through the LibbyApp or eLibraryNJ
For kids, don't forget Tumblebooks for Picture Books, Easy Readers, Graphic Novels, Nonfiction, Videos, Puzzles and Games

You must have a Mountainside Library Card to access.  If your card has expired or you are a Mountainside resident and do not have a library card, please call the library's phone number and you will be automatically renewed or assigned a temporary card so you will be able to access our electronic sources.

Welcome to the Mountainside Public Library



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The Mountainside Public Library is the proud first recipient of the
LUCCy Award!

The Libraries of Union County Consortium (LUCC) awards the LUCCy yearly to a Public Library in Union County to honor Excellence in Library Service.  Read more...