Diamond Bar city, California
Population estimates, July 1, 2025, (V2025) 51,884
People
Population
Population estimates, July 1, 2025, (V2025) 51,884
Population estimates, July 1, 2024, (V2024) 52,292
Population estimates base, April 1, 2020, (V2025) 55,190
Population estimates base, April 1, 2020, (V2024) 55,190
Population, percent change - April 1, 2020 (estimates base) to July 1, 2025, (V2025) -6.0%
Population, percent change - April 1, 2020 (estimates base) to July 1, 2024, (V2024) -5.3%
Population, Census, April 1, 2020 55,072
Population, Census, April 1, 2010 55,544
Age and Sex
Persons under 5 years, percent 3.6%
Persons under 18 years, percent 19.0%
Persons 65 years and over, percent 21.0%
Female persons, percent 52.5%
Race and Hispanic Origin
White alone, percent 14.6%
Black alone, percent(a) 3.1%
American Indian and Alaska Native alone, percent(a) 0.9%
Asian alone, percent(a) 62.7%
Native Hawaiian and Other Pacific Islander alone, percent(a) 0.3%
Two or More Races, percent 11.4%
Hispanic or Latino, percent(b) 17.4%
White alone, not Hispanic or Latino, percent 11.8%
Population Characteristics
Veterans, 2020-2024 1,077
Foreign-born persons, percent, 2020-2024 47.3%
Housing
Housing Units, July 1, 2025, (V2025) X
Owner-occupied housing unit rate, 2020-2024 77.3%
Median value of owner-occupied housing units, 2020-2024 $902,200
Median selected monthly owner costs - with a mortgage, 2020-2024 $3,149
Median selected monthly owner costs - without a mortage, 2020-2024 $984
Median gross rent, 2020-2024 $2,521
Building Permits, 2025 X
Families & Living Arrangements
Households, 2020-2024 18,005
Persons per household, 2020-2024 2.95
Living in the same house 1 year ago, percent of persons age 1 year+ , 2020-2024 92.7%
Language other than English spoken at home, percent of persons age 5 years+, 2020-2024 63.3%
Computer and Internet Use
Households with a computer, percent, 2020-2024 98.6%
Households with a broadband Internet subscription, percent, 2020-2024 96.0%
Education
High school graduate or higher, percent of persons age 25 years+, 2020-2024 92.1%
Bachelor's degree or higher, percent of persons age 25 years+, 2020-2024 52.8%
Health
With a disability, under age 65 years, percent, 2020-2024 4.4%
Persons without health insurance, under age 65 years, percent 3.8%
Economy
In civilian labor force, total, percent of population age 16 years+, 2020-2024 61.0%
In civilian labor force, female, percent of population age 16 years+, 2020-2024 56.9%
Total accommodation and food services sales, 2022 ($1,000)(c) 126,926
Total health care and social assistance receipts/revenue, 2022 ($1,000)(c) 194,598
Total transportation and warehousing receipts/revenue, 2022 ($1,000)(c) 317,694
Total retail sales, 2022 ($1,000)(c) 666,761
Total retail sales per capita, 2022(c) $12,641
Transportation
Mean travel time to work (minutes), workers age 16 years+, 2020-2024 33.3
Income & Poverty
Median households income (in 2024 dollars), 2020-2024 $108,281
Per capita income in past 12 months (in 2024 dollars), 2020-2024 $47,945
Persons in poverty, percent 10.0%
Businesses
Businesses
Total employer establishments, 2023 X
Total employment, 2023 X
Total annual payroll, 2023 ($1,000) X
Total employment, percent change, 2022-2023 X
Total nonemployer establishments, 2023 X
All employer firms, Reference year 2023 X
Male-owned employer firms, Reference year 2023 X
Female-owned employer firms, Reference year 2023 X
Minority-owned employer firms, Reference year 2023 X
Nonminority-owned employer firms, Reference year 2023 X
Veteran-owned employer firms, Reference year 2023 X
Nonveteran-owned employer firms, Reference year 2023 X
Geography
Geography
Population per square mile, 2020 3,703.6
Population per square mile, 2010 3,732.9
Land area in square miles, 2020 14.87
Land area in square miles, 2010 14.88
FIPS Code 0619192