All LA County Library locations will be closed on Monday, September 2, 2024 in honor of Labor Day. Our Digital Library is open 24/7.
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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

bookmark contest

Kick Off the School Year with Creativity: LA County Library’s 45th Annual Bookmark Contest Invites Young Artists to Shine

LA County Library announces the 45 annual Bookmark contest for grades K-12. Click to see the press release.

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Library Happenings

Library Happenings August 2024

Check out what's happening at LA County Library this month. Read, celebrate, learn, enjoy!

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One Book One County Author Talk & Celebration

LA County Library Hosts Special Celebration for One Book, One County on July 27 with LA Public Library

LA County Library announces details of the One Book, One County Author Talk and Celebration to be held on July 27.

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Paramount Library Grand opening with Supervisor Janice Hahn, LA County Library CEO Skye Patrick and Andrea Crow, Community Library Manager for Paramount Library

LA County Library and Supervisor Janice Hahn Celebrate Paramount Library Reopening After $4.8 Million Transformation

LA County Library announces the reopening of Paramount library after an extensive renovation.

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