Diamond Bar Flag

Diamond Bar

County Seat:
No
Area (mi²):
14.878
State:
California

Diamond Bar is a city located in Los Angeles County, California. Diamond Bar has a 2026 population of 50,933. Diamond Bar is currently declining at a rate of -1.32% annually and its population has decreased by -7.41% since the most recent census, which recorded a population of 55,010 in 2020.

The median household income in Diamond Bar is $108,281 with a poverty rate of 10.04%. The median age in Diamond Bar is 45.7 years: 45.5 years for males, and 45.8 years for females. For every 100 females there are 90.3 males.

50.9K
Total Population
3,423
Density (mi²)
-679 -1.32%
Growth

Diamond Bar Population

Diamond Bar Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202650,933-679-1.32%
202551,612-680-1.3%
202452,292-238-0.45%
202352,530-505-0.95%
202253,035-804-1.49%
202153,839-1,171-2.13%
202055,010-180-0.33%
201955,489-541-0.97%
201856,030-368-0.65%
201756,398-171-0.3%
201656,5691270.23%
201556,4422640.47%
201456,178700.12%
201356,1081400.25%
201255,9682020.36%
201155,7662070.37%
201055,559150.03%
200056,2872,6154.87%
199053,67225,62791.38%
198028,04517,469165.18%
197010,57600%

Median Age

Overall: 45.7 years
Female: 45.8 years
Male: 45.5 years

Diamond Bar Adults

There are 43,229 adults, (11,217 of whom are seniors) in Diamond Bar.

Sex Ratio

Female: 28,031 (52.5%)
Male: 25,324 (47.5%)

Demographics

The racial composition of Diamond Bar includes 62.7% Asian, 14.56% White, 7.14% other race, 3.1% Black or African American, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
Asian33,45262.7%
White7,76614.56%
Two or more races6,06511.37%
Other race3,8087.14%
Black or African American1,6543.1%
Native American4550.85%
Native Hawaiian or Pacific Islander1550.29%
Race
Population ↓
Percentage (of total)
Two or more races3,9097.33%
Other race3,5406.63%
White1,4902.79%
Native American1650.31%
Asian1360.25%
Black or African American510.1%
Race
Population ↓
Percentage (of total)
Asian33,31662.44%
White6,27611.76%
Two or more races2,1564.04%
Black or African American1,6033%
Native American2900.54%
Other race2680.5%
Native Hawaiian or Pacific Islander1550.29%

Diamond Bar Marital Status

Economics and Income Statistics

Diamond Bar 's average per capita income is $61,878. Household income levels show a median of $108,281. The poverty rate stands at 10.04%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$134,432-
Families$122,764$151,564
Households$108,281$138,466
Non Families$48,010$66,719

$61,878

Average Income

$108,281

Median Household Income

10.04%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)