Contact City of Diamond Bar Customer Service
City of Diamond Bar Phone Numbers and Emails
Toll-Free Number:
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(800) 877-8339TTY/Voice communication
City Clerks Office:
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(909) 839-7010
Construction Inspection Hotline:
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(909) 839-7027
Employment Hotline:
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(909) 349-8300
City of Diamond Bar Email:
Contact Information
City of Diamond Bar Website:
City of Diamond Bar Help Center:
Corporate Office Address:
Other Info (opening hours):
Office Hours:
Monday - Thursday: 7:30 am - 5:30 pm
Friday: 7:30 am - 4:30 pm
About
City of Diamond Bar is an affluent community in eastern Los Angeles County of California. The population was 55,544 at the 2010 census, down from 56,287 at the 2000 census. It is named after the "diamond over a bar" branding iron registered in 1918 by ranch owner Frederick E. Lewis. Located at the junction of the Pomona and Orange freeways, City of Diamond Bar is primarily residential with shopping centers interspersed throughout the city. It is surrounded by the suburban cities, such as Brea, Walnut, Chino Hills, and Rowland Heights. The city features a public Los Angeles County golf course. Diamond Bar has the first hydrogen fueling station to be built in Southern California, near the South Coast Air Quality Management District AQMD building.
