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City Hall

21810 Copley Drive Diamond Bar CA 91765

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Physical Address:

21810 Copley Drive
Diamond Bar, CA 91765

Mailing Address:

21810 Copley Drive
Diamond Bar, CA 91765

Phone:

(909) 839-7000

Hours
Monday - Thursday
7:30 a.m. - 5:30 p.m.

Fridays
7:30 a.m. - 4:30 p.m.

Field / Weather Hotline

Phone:

(909) 348-8310

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A five-member city council is elected by the residents, and mayor is elected annually by the council to serve a one-year term.

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Learn more about current roadway maintenance projects, freeway (57/60) construction projects, City facility updates, and status of commercial developments.

Strategic Plan
This three-year plan provides a unified guiding framework for setting priorities and allocating resources to produce the best outcomes for the community's well-being and City's fiscal health.

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City of Diamond Bar
21810 Copley Drive
Diamond Bar California 91765
Phone: (909) 839-7000
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Office Hours

Monday - Thursday
7:30 a.m. - 5:30 p.m.
Friday
7:30 a.m. - 4:30 p.m.

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