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Diamond Bar, CA
Full City Profile · California · Orange County County
3.2
/5.0
B
Good
53,750
Population
3,612/sq mi density
$106,602
Median Income
$47,919 per capita
$867,000
Home Value
$1,010,375 Zillow
$2,422
Median Rent
39.0% income on rent
65°F
Avg Temperature
330 sunny days/yr
128
Violent Crime/100K
1,611 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.7 / 5.0
$106,602 median income, 3.1% unemployment
C
Affordability
2.1 / 5.0
$867,000 home value, $2,422/mo rent
F
Safety
1.0 / 5.0
128 violent crimes/100K
A+
Education
5.0 / 5.0
52.7% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-6.4%
56,108 → 52,530
over 10 years
Annual Pop. Growth
-0.66%
Compound annual growth rate
Median Income Change
+20.6%
$88,422 → $106,602
nominal, not inflation-adjusted
Annual Income Growth
+1.89%
Compound annual growth rate
Population Over Time
Total population for Diamond Bar across each available Census ACS release.
Median Household Income Over Time
Median household income reported by U.S. Census ACS. Values are nominal (not adjusted for inflation).
Projected 2030
Simple projections extrapolating the 2013–2023 compound annual growth rate forward. These are mathematical extensions of recent trends, not forecasts — real outcomes depend on migration, policy and economic shifts.
Projected Population 2030
50,151
-2,379 from 2023 (52,530)
Projected Median Income 2030
$121,531
+$14,929 from 2023 ($106,602)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 56,108 | — | $88,422 | — |
| 2015 | 56,442 | +0.6% | $89,221 | +0.9% |
| 2017 | 56,398 | -0.1% | $94,531 | +6% |
| 2019 | 55,489 | -1.6% | $99,083 | +4.8% |
| 2021 | 53,857 | -2.9% | $100,776 | +1.7% |
| 2023 | 52,530 | -2.5% | $106,602 | +5.8% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.