Diamond Bar, CA Census Data
The 174th largest city in California by population · 188 cities ranked
Diamond Bar is the 174th largest city in California by population and ranks 73rd of 188 for median household income. With 53,750 residents, it has a lower poverty rate than 109 other California cities. This snapshot draws from the 2023 American Community Survey (ACS) 5-year estimates.
Updated: 2026-04-13 · Source: U.S. Census Bureau, ACS 2023
Population
53,750
46.5% male · 53.5% female
Median Age
45.6
6.9 above the national average (38.7 yrs)
Median Household Income
$106,602
$28,064 above the national average ($78,538)
Bachelor's Degree or Higher
52.7%
17.7% above the national average (35.0%)
HS diploma or higher: 92.8%
Poverty Rate
9.1%
3.3% below the national average (12.4%)
Uninsured: 3.7%
Broadband Access
98.3%
8.6% above the national average (89.7%)
Median Home Value
$867,000
Median rent: $2,422 · 77% owner-occupied
Unemployment Rate
5.1%
Labor force participation: 59.1%
Per Capita Income
$55,217
Individual average income (not household)
Veteran Population
3.1%
Disability rate: 8.5%
How Diamond Bar Compares to Other California Cities
Rankings among all 188 California cities tracked in the 2023 ACS.
| Ranking | Position | Tier |
|---|---|---|
| Largest by Population | 174th of 188 | Bottom 25% |
| Highest Median Income | 73rd of 188 | Top half |
| Lowest Poverty Rate | 79th of 188 | Top half |
| Highest Bachelor's Attainment | 33rd of 188 | Top 25% |
| Highest Home Value | 54th of 188 | Top half |
Demographics
Race & Ethnicity
Age Distribution
Commute to Work
Diamond Bar, CA Frequently Asked Questions
What is the population of Diamond Bar, CA?
The population of Diamond Bar, CA is 53,750 according to the 2023 American Community Survey 5-year estimates. The median age is 45.6 years.
What is the median household income in Diamond Bar?
The median household income in Diamond Bar, CA is $106,602, above the national average of $78,538. Per capita income is $55,217.
What is the poverty rate in Diamond Bar?
The poverty rate in Diamond Bar, CA is 9.1%, compared to the national average of 12.4%. About 3.7% of residents lack health insurance.
What percentage of Diamond Bar residents have a college degree?
52.7% of adults (25+) in Diamond Bar hold a bachelor's degree or higher, and 92.8% have at least a high school diploma. The national average for bachelor's degree holders is 35.0%.
What is the median home value in Diamond Bar?
The median home value in Diamond Bar, CA is $867,000. Median rent is $2,422 per month, with 77% of housing units owner-occupied.
What is the racial makeup of Diamond Bar?
Diamond Bar's population is 17.4% White, 3.0% Black, 17.0% Hispanic or Latino, and 62.1% Asian (source: 2023 ACS).
How does Diamond Bar rank among California cities?
Diamond Bar is the 174th largest city in California by population, the 73rd highest for median household income, the 79th lowest for poverty rate, the 33rd highest for bachelor's degree attainment among 188 ranked California cities.
What is the unemployment rate in Diamond Bar?
The unemployment rate in Diamond Bar, CA is 5.1%, with a labor force participation rate of 59.1%. Per capita income is $55,217.
Cities Similar to Diamond Bar
Other California cities with comparable population and income levels.