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

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

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

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

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2010Modern 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?

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

Significant Asian American population.

Affluent planned community in eastern LA County.

Diamond Bar is located in Los Angeles County, California.

Diamond Bar was founded in 1989.

Famous People from Diamond Bar, California

Gia Paloma

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

Nadia Mejia

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

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