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Diamond Bar, California

Located in Los Angeles County, California, Diamond Bar was established in 1989. Named for the Diamond Bar Ranch which used a diamond-shaped brand. Significant Asian American population.

Founded 1989 | Population 55,000 | Peak 55,000 (2024) | County Los Angeles County

Top 10 Most Important Events for Diamond Bar, California

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1890 Higher Education: Educational institutions helped define Diamond Bar's character and economy.

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1942 Military Presence: Military installations became a major part of Diamond Bar's identity and economy.

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1950 Economic Development: Diamond Bar grew through manufacturing and industry.

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1989 Founded: Diamond Bar was founded in Los Angeles County.

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2010 Modern Era: Diamond Bar continued to develop as part of the greater metropolitan area, with new infrastructure and community amenities.

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Complete Historical Timeline

1890 Culture

Higher Education

1942 Government

Military Presence

1950 Industry

Economic Development

1989 Culture

Founded

2010 Culture

Modern Era

Did You Know?

1

Named for the Diamond Bar Ranch which used a diamond-shaped brand.

2

Significant Asian American population.

3

Affluent planned community in eastern LA County.

4

Diamond Bar is located in Los Angeles County, California.

5

Diamond Bar was founded in 1989.

Famous People from Diamond Bar, California

GP

Gia Paloma

Actor, Pornographic Actor · Born Jun 27, 1984 · Age 41

NM

Nadia Mejia

Beauty Pageant Contestant · Born Nov 22, 1995 · Age 30

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