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Diamond Bar Library

Library Hours

  • Monday 10 am - 8 pm
  • Tuesday 10 am - 8 pm
  • Wednesday 10 am - 8 pm
  • Thursday 10 am - 8 pm
  • Friday 10 am - 6 pm
  • Saturday 10 am - 6 pm
  • Sunday Closed

Holiday Closures

Get to Know This Library

About Diamond Bar Library

About Diamond Bar Library

  • Library Size: 18,245 sq ft
  • Space for Children
  • Book Drop
  • Space for Teens
  • Study Rooms: Capacity 4 - 6

Our Collections

Our Collections

Online Collections — Available 24 hours

Newspapers

Our Services

Our Services

Children's Services

Our Computers

Our Computers

  • Public Computers: 11
  • Children's Computers: 5
  • Teen Computers: 6
  • Laptop & Hotspot Kits: 5
  • Express Computers: 8
  • Early Learning Computers: 4

Our Community

Friends of the Library

Friends of Diamond Bar Library a volunteer-run organization that supports the library and library events

Friends of Diamond Bar Library provides the following services to support the library.

  • Friends of Diamond Bar Library Book Store

Library History

Originally opened in 1977, the Diamond Bar Library has long provided valuable services to both residents and visitors.

The Diamond Bar Library at 1061 Grand Avenue was rededicated on August 15, 1998 after renovations made possible by the City of Diamond Bar Redevelopment Agency, the County of Los Angeles, and the Diamond Bar Friends of the Library.

On July 28, 2012, the Diamond Bar Library celebrated the grand opening of the new location at 21800 Copley Drive. The new 18, 245 square foot library is located on the 1st floor of the City Hall building.

Political Representatives

Local Links

Staff Picks (All Ages)

A monthly list of noteworthy titles selected by our Collection Development Services team.

See More Booklists

Library Happenings December 2023

Library Happenings Dec 2023

Check out what's happening at LA County Library this December. There's so much to see, do, and learn.

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LA County Library Happenings

Library Happenings Nov 2023

Check out what's happening at LA County Library this November and see, do, and learn something new.

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Pink "little library" in downtown LA Park

LA County Library Debuts Four New Little Libraries at Gloria Molina Grand Park in the Heart of Downtown Los Angeles

Click to learn about the 4 "little libraries" that LA County Library has installed in Gloria Molina Grand Park in Downtown Los Angeles.

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Free Vaccine Clinics

LA County Library Hosts Vaccine Clinics at Select Libraries, Providing Free Flu Shots, Updated 2023-2024 COVID-19 Vaccines, and Mpox Vaccines

LA County announces free vaccine clinics at select LA County Library locations through December 20, 2023.

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