Diamond Bar Library

Location and Hours

The Diamond Bar Public Library, which is operated by Los Angeles County, is located at 21800 Copley Drive, the first floor of the City Hall facility. The library is open from noon to 9 p.m., Monday through Thursday, and from 10 a.m. to 5 p.m. on Friday and Saturday.

 For more information about library services or hours, call 909.861.4978.