Diamond Bar, CA | Official Website

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Concerts in the Park Return This Summer

UPDATE-Registration and reserved seating are no longer required for summer concert series attendance. See webpage for more details
Indoor Mask Mandate

The indoor mask mandate has been reinstated effective July 17 in response to a rise in transmission rates of COVID-19
Residents Invited to Enter Photo Contest

Capture your life in Diamond Bar through photos! Through My Lens contest entries accepted until August 31

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Easily Request Public Records

Online portal makes it easier and more convenient to request and track public record requests.
New City Mobile App

The City has released a new and improved version of its mobile app... quickly and easily ask a question or request a service from any mobile device.
Free Used Oil Change Kits Available

Did you know that used motor oil can be recycled and reused indefinitely? Make an appointment to pick-up your free used oil change kit while supplies last.