- 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
Get to Know This Library
- In-person and telephone research assistance
- MetroTAP Cards
- Early Learning and Engagement
- Online Homework Help
- Public Computers: 11
- Children's Computers: 5
- Teen Computers: 6
- Laptop & Hotspot Kits: 5
- Express Computers: 8
- Early Learning Computers: 4
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
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.
- Walnut/San Dimas Regional Sheriff's Station: Serving the community of Diamond Bar.
- City of Diamond Bar Web Page: An award-winning web site!
- Pomona Unified School District: One of two school districts that serve Diamond Bar.
- Walnut Valley Unified School District: One of two school districts that serve Diamond Bar.
- Diamond Bar Friends of the Library: The Friends of the Diamond Bar Library is a group of individuals who help the library promote literacy in the City of Diamond Bar.
Staff Picks (All Ages)
A monthly list of noteworthy titles selected by our Collection Development Services team.
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.
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.