Diamond Bar, California Demographics & Population 2026
During the 2020–2024 ACS period, Diamond Bar, California had a total population of 53,355, the 174th largest city in California, with a median household income of $108,281, which is 9% higher than the state average. The poverty rate is 10.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing affordability is a challenge — homes cost 8.3x the median household income.
Diamond Bar Quick Facts
How Diamond Bar Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 53,750 | 53,355 | -0.7% |
| Median household income | $106,602 | $108,281 | +1.6% |
| Median home value | $867,000 | $902,200 | +4.1% |
How Diamond Bar Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A diverse community with significant representation from multiple racial and ethnic groups.
State average: 70 | National average: 61
Education
Educational Attainment (Adults 25+)
Diamond Bar Rankings in California
Explore California Rankings
Other Cities in Los Angeles County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Los Angeles | 3,857,263 | $81,939 | 16.6% | $921,200 |
| Long Beach | 455,548 | $87,430 | 14.8% | $806,600 |
| Santa Clarita | 230,221 | $123,062 | 7.4% | $784,700 |
| Glendale | 190,748 | $88,393 | 12.9% | $1,102,300 |
| Lancaster | 169,169 | $81,511 | 15.6% | $446,600 |
| Palmdale | 164,634 | $81,770 | 15.7% | $471,000 |
| Pomona | 147,943 | $79,479 | 14.3% | $593,800 |
| Torrance | 142,130 | $116,217 | 7.8% | $1,074,700 |
| Pasadena | 136,969 | $105,192 | 13.3% | $1,093,300 |
| East Los Angeles | 111,647 | $68,741 | 17.3% | $643,100 |
Cities Similar to Diamond Bar
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Hacienda Heights | 54,291 | $109,193 | $820,800 | 35.1% | 11.3% |
| Lincoln | 52,956 | $111,990 | $651,000 | 40.1% | 6.9% |
| Placentia | 52,826 | $115,929 | $921,000 | 44.2% | 7.9% |
| Novato | 52,546 | $115,736 | $1,032,500 | 48.9% | 9.6% |
| Arcadia | 55,170 | $113,516 | $1,441,800 | 57.4% | 8.6% |
Population Overview
Diamond Bar is a mid-sized community located in California, within Los Angeles County. The total population is 53,355. It ranks as the 174th most populous out of 1,570 Census-designated places in California.
Age Demographics
The median age in Diamond Bar is 45.7 years. This is 21% higher than the state median of 37.9 years.
Economy, Income & Housing
The median household income in Diamond Bar is $108,281. This is 9% higher than the state median of $99,122. It is also 34% higher than the national median of $80,734. The poverty rate stands at 10.0%. This is 16% lower than the state poverty rate of 12.0%. The unemployment rate is 4.9%. This is 26% lower than the state rate of 6.6%. The median home value is $902,200. Housing costs are 23% higher than the state median of $734,700. The home-value-to-income ratio of 8.3x suggests that housing affordability is a significant concern for many residents. 77.3% of occupied housing units are owner-occupied. This homeownership rate is 38% higher than the state average of 55.9%.
Race & Ethnicity
The largest racial or ethnic group in Diamond Bar is Asian, making up 62.4% of the population. Hispanic or Latino residents account for 17.4%. The White (non-Hispanic) population (11.8%) is well below the state average of 33.8%. The Hispanic or Latino population (17.4%) is well below the state average of 40.2%. The Asian population is significantly higher than the state average (62.4% vs 15.3%).
Education
52.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 42% higher than the state rate of 37.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.1%. Notably, 19.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Diamond Bar, California is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,570 Census-designated places in California. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Diamond Bar, California?
Diamond Bar, California has a population of 53,355 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Diamond Bar, CA?
The median household income in Diamond Bar is $108,281, which is 34% higher than the national median of $80,734.
What is the poverty rate in Diamond Bar, CA?
The poverty rate in Diamond Bar is 10.0%. This means approximately 5,342 residents live below the federal poverty line.
What is the racial makeup of Diamond Bar, California?
Diamond Bar's population is 11.8% White, 3.0% Black, 17.4% Hispanic/Latino, and 62.4% Asian.
What is the median home value in Diamond Bar, CA?
The median home value in Diamond Bar is $902,200. The home-value-to-income ratio is 8.3x.
How educated is Diamond Bar, California?
52.8% of adults (25+) in Diamond Bar hold a bachelor's degree or higher, and 19.2% hold a graduate or professional degree.