City of Diamond Bar

Seal of the City of Diamond Bar

General Law city
Incorporated: May 18, 1989
City Hall: 21825E Copley Dr, Diamond Bar, California 91765
City Telephone: (909) 860-7000
Website: www.cityofdiamondbar.com
Population (2010 Census):
55,544 (2000 Census: 56,287; 1990 Census: 53,672). For latest State Population Estimates, click here.
Population Density (2010 Census): 3,732.8 persons per square mile
Population Age 65+ (2010 Census): 11.7% (2000 Census: 7.5%; 1990 Census: 4.2%)
Population Under Age 18 (2010 Census): 21.4% (2000 Census: 27.0%; 1990 Census: 28.6%)
Land Area: 14.88 square miles (38.54 square kilometers)
Water Area: 0.01 square miles (0.01 square kilometers)

Other City Facts & Statistics

City Government Officials

Named for the branding iron symbol (a diamond over a bar) of rancher Fredrick Lewis.

City in red below. Click on map for more detailed color map of county.

Map showing location of the City of Diamond Bar