City profile · California · Census ACS 2023

Diamond Bar, CA

Population, income, housing, safety, climate and schools for Diamond Bar - drawn straight from Census ACS, FBI UCR, NOAA, NCES, HUD and FEMA, refreshed on the 2024–2025 release cycle.

53,750
Residents
$106,602
Median income
$867,000
Median home
$3,236
Median rent (state)

Diamond Bar - the verdict

Measured against every US city with at least 1,000 residents, Diamond Bar lands in the 81st percentile for household income and the 33rd percentile for safety. Source: Census ACS + FBI UCR.

81st
percentile, household income
96th
percentile, home value
98th
percentile, median rent
33rd
percentile, safety
📝 How we sourced this

Population, income, and housing-cost figures come from the U.S. Census Bureau American Community Survey 5-year estimates (B-series tables). Crime data uses FBI UCR; climate uses NOAA Climate Normals; school counts come from NCES Common Core of Data; permits use the Census Building Permits Survey (BPS). See our methodology page for the full ETL pipeline and OMB / FIPS join keys.

Data Snapshot: Diamond Bar, CA

Census ACS 2023 estimates count 53,750 residents in Diamond Bar, a small city within California. The typical household in Diamond Bar brings in $106,602 a year, placing it in the top quartile of U.S. cities for household income, with a poverty rate of 6.9%. Typical homes in Diamond Bar are valued around $867,000, and the median resident age is 45.6 years. About 52.7% of adults hold a bachelor's degree or higher, while 59.1% of working-age residents are in the labor force.

Housing supply pressure shows in Census Building Permit Survey data: 50 residential units were authorized in 2024 (Building Boom), up 213% from five years earlier. Crime here tracks close to the national norm: FBI UCR reporting places total crime at 1940.3 incidents per 100,000 residents, near the national average (voluntary agency reporting, reflects reporting activity, not a definitive danger score).

California carries a cost-of-living premium: the state registers 110.7 on a 100-equals-national-average index (Well Above Average) per BEA Regional Price Parities 2024. A typical two-bedroom carries a HUD Fair Market Rent of $3,236 per month statewide. Statewide, average monthly utility bills in California run around $275, per EIA 2023 residential energy data. Commute times here average 29.0 minutes, with 71.9% driving alone and 16.5% working from home, per Census ACS commuting data. Natural-hazard exposure scores 99.8 out of 100 on FEMA's National Risk Index (Very High).

Population

53,750 residents

Census ACS 2023 - California

Median Household Income

$106,602 /yr

Poverty 6.9%

Cost of Living Index (state)

110.7 (US=100)

Well Above Average - BEA RPP 2024, California average

How does Diamond Bar compare to other US cities?

Diamond Bar measured against every US city with 1,000+ residents, computed live from the same Census and FBI data shown throughout this page.

Household income 81% higher than other cities
Home value 96% pricier than other cities
Median rent 98% pricier than other cities
Safety 33% safer than other cities

"Safer than" reflects total crime rate from FBI UCR; the others use Census ACS estimates.

National percentiles can mask local variation. Looking only at California, Diamond Bar ranks #228 of 441 California cities by lowest crime rate - a narrower, more locally useful cut than the national comparison above.

How we calculate these percentiles & ranks

For each metric we count every US city with population 1,000+ and a non-null value, then compute what share of them fall below Diamond Bar's value: round(cities-below ÷ total × 100). Safety is inverted (percentile = share of cities with a higher crime rate) so a higher number always means safer. The in-state rank narrows that same crime-rate comparison to only the cities PlainCities tracks in California, breaking ties alphabetically. See the methodology page for the full source-to-figure lineage.

81stIncome percentile
33rdSafety percentile

81st percentile nationally for median household income · 33rd percentile for safety (lower crime rate). Source: Census ACS 2023 / FBI UCR 2023.

Diamond Bar's profile vs. every US city

Income, affordability, and safety percentile

Diamond Bar's percentile rank on 3 favorable-direction measures (income, affordability, safety) vs. every tracked US city -- higher on every axis is more favorable. Not a composite quality score, just the arithmetic mean of the axes shown. 3-axis radar comparing 1 series across Income, Affordability, Safety. IncomeAffordabilitySafety 39 Avg. percentile National median
Diamond Bar's percentile rank on 3 favorable-direction measures (income, affordability, safety) vs. every tracked US city -- higher on every axis is more favorable. Not a composite quality score, just the arithmetic mean of the axes shown.

How Diamond Bar's home value compares nationally

Median home value vs. every US city (population 1,000+)

$867,000 4th percentile more affordable than 4% of 15,600 US cities

$0–$25,000: 5 US cities (0%). Below this entry. $25,000–$50,000: 54 US cities (0%). Below this entry. $50,000–$75,000: 352 US cities (2%). Below this entry. $75,000–$100,000: 1,086 US cities (7%). Below this entry. $100,000–$125,000: 1,516 US cities (10%). Below this entry. $125,000–$150,000: 1,170 US cities (8%). Below this entry. $150,000–$175,000: 1,278 US cities (8%). Below this entry. $175,000–$200,000: 1,229 US cities (8%). Below this entry. $200,000–$225,000: 1,035 US cities (7%). Below this entry. $225,000–$250,000: 976 US cities (6%). Below this entry. $250,000–$275,000: 754 US cities (5%). Below this entry. $275,000–$300,000: 712 US cities (5%). Below this entry. $300,000–$325,000: 521 US cities (3%). Below this entry. $325,000–$350,000: 526 US cities (3%). Below this entry. $350,000–$375,000: 465 US cities (3%). Below this entry. $375,000–$400,000: 393 US cities (3%). Below this entry. $400,000–$425,000: 317 US cities (2%). Below this entry. $425,000–$450,000: 300 US cities (2%). Below this entry. $450,000–$475,000: 307 US cities (2%). Below this entry. $475,000–$500,000: 250 US cities (2%). Below this entry. $500,000–$525,000: 160 US cities (1%). Below this entry. $525,000–$550,000: 156 US cities (1%). Below this entry. $550,000–$575,000: 172 US cities (1%). Below this entry. $575,000–$600,000: 172 US cities (1%). Below this entry. $600,000–$625,000: 163 US cities (1%). Below this entry. $625,000–$650,000: 167 US cities (1%). Below this entry. $650,000–$675,000: 135 US cities (1%). Below this entry. $675,000–$700,000: 101 US cities (1%). Below this entry. $700,000–$725,000: 95 US cities (1%). Below this entry. $725,000–$750,000: 71 US cities (0%). Below this entry. $750,000–$775,000: 65 US cities (0%). Below this entry. $775,000–$800,000: 70 US cities (0%). Below this entry. $800,000–$825,000: 57 US cities (0%). Below this entry. $825,000–$850,000: 67 US cities (0%). Below this entry. $850,000–$875,000: 60 US cities (0%). This entry sits in this band. $875,000–$900,000: 58 US cities (0%). Above this entry. $900,000–$925,000: 47 US cities (0%). Above this entry. $925,000–$950,000: 37 US cities (0%). Above this entry. $950,000–$975,000: 31 US cities (0%). Above this entry. $975,000–$1,000,000: 470 US cities (3%). Above this entry. $1,000,000–$1,025,000: 0 US cities (0%). Above this entry. Diamond Bar $0 $1,025,000 every US city, bucketed by value

Each bar is a $25K-wide band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau ACS 5-Year Estimates · 2023

Income distribution context

Household income distribution - Diamond Bar, CA Diamond Bar, CA's reported median household income shown against the U.S. national quintile-share pattern (not Diamond Bar, CA-specific quintile data). The Lorenz curve traces the national cumulative income share against cumulative population share, perfect equality is the diagonal; observed inequality bows below. $ Household Income Distribution Diamond Bar, CA median $106,602/yr, vs. U.S. national quintile pattern QUINTILE SHARE OF AGGREGATE INCOME Lowest 20% 3.4% Second 20% 9.2% Middle 20% 15.1% Fourth 20% 23.2% Top 20% 49.1% LORENZ CURVE cumulative income vs. population 100% 0% 100% pop. 0%
Diamond Bar, CA's median household income (Census ACS 5-year estimate) plotted against the U.S. national income-quintile distribution pattern for context; the quintile shares and Lorenz curve are national figures, not computed specifically for Diamond Bar, CA. Diagonal = perfect equality.

Key socioeconomic indicators

Bachelor's degree or higher (adults 25+) 52.7%

Census ACS S1501, educational attainment

Poverty rate (households below FPL) 6.9%

Census ACS S1701, poverty status

Labor force participation (adults 16+) 59.1%

Census ACS S2301, share of working-age residents in the labor force

Population
53,750
Median Income
$106,602
Median Home Value
$867,000
Median Age
45.6
Poverty Rate
6.9%
Labor force participation
59.1%
Bachelor's Degree+
52.7%

Safety & Crime

Total Crime Rate
1940.3
per 100,000 residents
Violent Crime
78.2
per 100,000 residents
Property Crime
1862.1
per 100,000 residents

Reflects incidents reported to the FBI's Uniform Crime Reporting program — agency participation is voluntary and reporting completeness varies by jurisdiction and year, so this reflects reporting activity, not a definitive danger score. Not adjusted for tourism, commuter, or daytime population.

Schools

Total Schools
10
Public schools in this city

Population Change

Annual U.S. Census Bureau Population Estimates Program (PEP) estimates, 2020–2025

See the fastest-growing cities →
51,000 residents52,000 residents53,000 residents54,000 residents55,000 residents56,000 residents 202020212022202320242025 55,006 residents 51,884 residents ▼ -5.7%
Diamond Bar's Census PEP population estimates, 2020–2025.

Housing Supply

Census Bureau Building Permits Survey (BPS) - annual residential permits authorized

📈 Building Boom
Total Permits (2024)
50
housing units authorized
Single-Family
50
detached homes
Multifamily
0
apartments & condos
Supply Intensity
0.9
permits per 1,000 residents

5-Year Permit Trend (2019–2024)

Year Total
2019 16
2020 21
2021 20
2022 41
2023 43
2024 50

Permit volume increased 213% from 2019 to 2024.

Commute Patterns

How workers travel to work, Census ACS 2023

Average Commute Time
29.0 minutes
Drive Alone
71.9%
Carpool
8.9%
Public Transit
1.4%
Walk
0.4%
Work from Home
16.5%
Other
0.9%

Based on 25,950 workers 16 and over.

Monthly Utility Costs

State-average estimates for California - EIA 2023 residential energy data

Electricity
$150
avg/month
Natural Gas
$55
avg/month
Water & Sewer
$70
avg/month
Total Utilities
$275
estimated/month

Estimates reflect California state averages. Actual costs vary by home size, usage, and local rates. Source: U.S. Energy Information Administration (EIA) 2023.

Living Costs & Risk

Cost of living is a California state average from BEA; rent and hazard risk are county-level figures from HUD and FEMA for the county Diamond Bar sits in

Cost of Living Index
110.7
Well Above Average
US average = 100 · BEA RPP 2024
Typical 2-BR Rent
$3,236/mo
HUD Fair Market Rent
County-level FMR estimate
Natural Hazard Risk
99.8 / 100
Very High
FEMA NRI composite score (county)

Similar Cities in California

Colton
53,798 people
Huntington Park
53,658 people
Yucaipa
54,348 people
West Sacramento
54,496 people
San Jacinto
54,756 people
Novato
52,689 people

Cities of a Similar Size Nationwide

Population-matched peers from other states, closest to Diamond Bar's 53,750 residents (Census ACS 5-Year 2023).

Aspen Hill, MD
53,752 people
Elkhart, IN
53,726 people
Spring Hill, TN
53,585 people
Logan, UT
53,923 people
Manhattan, KS
53,951 people
Pensacola, FL
54,011 people

Cities with a Similar Household Income Nationwide

Median-household-income-matched peers from other states, closest to Diamond Bar's $106,602 (Census ACS 5-Year 2023, table B19013).

Ankeny, IA
$106,603 median income
Gwynneville, IN
$106,597 median income
Madaket, MA
$106,615 median income
Rolling Hills, WY
$106,618 median income
Eagle Harbor, MI
$106,625 median income
Malvern, PA
$106,638 median income

Race & Ethnicity Composition

Race and ethnicity - Diamond Bar, CA Race categories sum to one hundred percent per Census methodology. Hispanic or Latino is shown separately as an ethnicity overlay; it cuts across all race categories per OMB Directive 15. Race & Ethnicity Composition Diamond Bar, CA - Census ACS, OMB race + ethnicity categories RACE, sums to 100% 17.4% 62.0% 6.8% 9.6% ETHNICITY, Hispanic or Latino (any race) 17.0% White 17.4% Black or African American 3.0% Asian 62.0% American Indian 1.0% Native Hawaiian 0.2% Some other race 6.8% Two or more races 9.6% Per OMB Directive 15: Hispanic/Latino ethnicity is reported separately from the race categories.
Race categories sum to 100%. Hispanic or Latino ethnicity is reported separately and cuts across race per Census/OMB methodology.

City-level race and ethnicity, Census ACS 5-year 2023 (tables B02001, B03001), OMB Directive 15 categories.

How Diamond Bar compares to nearby California cities

Population + median household income, sourced from Census Bureau ACS 5-year B01001 (population) and B19013 (median household income).

City Population Median Household Income
Diamond Bar (this city) 53,750 $106,602
Colton 53,798 $69,581
Huntington Park 53,658 $56,952
Yucaipa 54,348 $92,401
Census ACS 5-year FIPS CA FBI UCR NCES CCD Census BPS 2024 OMB Bulletin 23-01

What do people ask about Diamond Bar, CA?

What is the population of Diamond Bar, CA? +

The population of Diamond Bar, CA stands at 53,750 according to U.S. Census Bureau ACS 2023 estimates.

What is the median household income in Diamond Bar, CA? +

Median annual household income in Diamond Bar runs $106,602, based on Census ACS 2023 data.

What is the cost of living in Diamond Bar? +

BEA does not publish a city-level cost-of-living figure for Diamond Bar; the closest available measure is the California state average, a cost of living index of 110.7 (U.S. average = 100), rated "Well Above Average" based on BEA Regional Price Parities 2024 data. Costs within California vary by metro area.

Is Diamond Bar, CA safe? +

Diamond Bar has a total crime rate of 1940.3 per 100,000 residents, which is near the national average. This reflects incidents reported to the FBI UCR program, not a definitive safety score -- agency reporting is voluntary and completeness varies by jurisdiction.

What is the median home value in Diamond Bar, CA? +

Homes in Diamond Bar carry a median value of $867,000, according to Census ACS 2023 estimates.

Source: U.S. Census Bureau ACS 5-Year 2023, FBI UCR, NCES CCD, Census BPS 2024, Census ACS B08301/B08136, U.S. Energy Information Administration (EIA) 2023, BEA Regional Price Parities 2024, HUD Fair Market Rents 2026, FEMA National Risk Index.

Read our methodology - how this data is sourced, computed, and verified.

Primary sources: Census ACS, FBI UCR, NOAA Climate Normals, NCES.

Citation & verification links Data sourced from the U.S. Census Bureau. See our methodology for details. Retrieved and formatted by PlainCities Editorial

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Every figure on PlainCities is rendered directly from Census ACS source data, no number is typed in by an editor. This page draws directly on Census ACS source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.