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Diamond Bar, CA

City in Los Angeles County, California. ZIP codes: 91765, 91789.

Population

53,355

Land area

14.9sq mi

People per sq mi

3,586

ZIP codes

2

Diamond Bar and its ZIP codes

Full map

Diamond Bar at a glance

  • Diamond Bar is about 14 times as dense as California as a whole.
  • By population, it ranks 174th among 1,570 cities and towns in California.
  • The median household income is $108,281, 9% above the California median of $99,122.
  • A typical owner-occupied home is valued at $902,200 (23% above California) and median rent is $2,521 a month.

Local data for Diamond Bar, CA

Counts from official public data

Housing and community stats

Diamond Bar, CA, American Community Survey 2020-2024

Full profile

Median household income

$108,281

Poverty rate

10.0%

Median home value

$902,200

Median rent

$2,521/mo

Homeownership

77.3%

Bachelor's or higher

52.8%

Median age

45.7

Average commute

33.3 min

Largest reported origins and ancestries: Chinese Americans (17,747), Mexican Americans (7,474), Korean Americans (4,125).

Home values and rentsIncome, education and commute

Economy and federal money

Jobs, pay, income and spending are for Los Angeles County. PPP loans are for Diamond Bar.

Details

Unemployment rate

4.5%

Sep 2026, -1.4 pts in a year

Average annual pay

$86,080

4,525,460 jobs, 2025

Income per person

$83,888

BEA, 2024

Federal spending

$72.1B

FY 2026, $7,195 per person

PPP loans

$102M

1,998 loans, 14,013 jobs reported

Los Angeles County economyFederal spendingPPP loans

How people get to work

Diamond Bar, CA, workers 16 and older. American Community Survey 5-year estimates

  • Drove alone69.9%
  • Carpooled9.3%
  • Public transit1.0%
  • Walked0.4%
  • Bicycle0.3%
  • Taxi, ride-hailing, motorcycle or other0.7%
  • Worked from home18.4%

Average one-way commute: 33.3 minutes for people who do not work from home.

Environment and hazard risk

Diamond Bar, CA, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Very High

Top: earthquake

Storm events since 1996

662

Countywide, mostly flash flood

Flood insurance policies

10,584

0.5% of homes, county

July high / Jan low

90° / 43°F

14.5 inches of rain a year

Hazards, floods and storm historyCheck a flood zone

Health statistics

Share of adults in Diamond Bar, CA, CDC PLACES estimates

All 40 measures

Obesity

18.2%

U.S. 33.3% -15.1 pts

Diabetes

12.5%

U.S. 12.1% about the same

Smoking

7.8%

U.S. 12.8% -5.0 pts

Uninsured (18-64)

5.5%

U.S. 11.1% -5.6 pts

ZIP codes in Diamond Bar

2 in or overlapping Diamond Bar. Population shown

·

Cities near Diamond Bar

NameDistanceLand area (sq mi)
WalnutCity2.9 mi9
Rowland HeightsCensus-designated place4.6 mi13.1
West CovinaCity5.3 mi16
South San Jose HillsCensus-designated place5.4 mi1.5
PomonaCity5.6 mi23
BreaCity6 mi12.6
Chino HillsCity6.6 mi44.6
ValindaCensus-designated place6.9 mi2
CovinaCity6.9 mi7
Charter OakCensus-designated place7.4 mi0.9
La PuenteCity7.7 mi3.5
San DimasCity7.8 mi15
La Habra HeightsCity7.8 mi6.2
Yorba LindaCity8.1 mi20
ChinoCity8.2 mi29.6
PlacentiaCity8.5 mi6.7

Frequently asked questions

What county is Diamond Bar, CA in?
Diamond Bar is in Los Angeles County, California.
What ZIP codes are in Diamond Bar, CA?
ZIP codes in or overlapping Diamond Bar include 91765, 91789.
What is the population of Diamond Bar, CA?
About 53,355 people live in Diamond Bar, based on American Community Survey 5-year estimates.
What cities are near Diamond Bar?
Nearby places include Walnut (2.9 mi), Rowland Heights (4.6 mi), West Covina (5.3 mi), South San Jose Hills (5.4 mi), Pomona (5.6 mi).

Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023