Diamond Bar, CA Population

Overview

55,339

Total Population

43.7

Median age

51.67%

Female population %

93.5:100

Gender ratio (M:F)

55-59 years

Largest age group

54.4

Total dependency ratio

Asian

Largest racial group

9,829

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Diamond Bar's population is old compared to the rest of the country:

The median age in Diamond Bar is 43.7, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Diamond Bar's population under 18 was 20.27%, compared to the 22.51% nationwide.
Diamond Bar's elderly or the senior population (over 65 age) was 18.36% as compared to 16.04% nationwide.
Of the total population in Diamond Bar, 16.87% were under the age of 15, 16.63% aged 15 to 29, 48.14% aged 30 to 64, 16.58% aged 65 to 84, and 1.79% were 85 years of age and older.

There are 1,847 more females than males in Diamond Bar:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 51.67% females and 48.33% males in Diamond Bar, CA.
The Diamond Bar, CA gender ratio is 93.5:100 i.e. 93.5 men to 100 women (0.935).
For male population, the largest age group is 55-59 years with a population of 2,200.
For the female population, the largest age group is 55-59 years with a population of 2,334.

Diamond Bar's population has become increasingly diverse:

Racial distribution of Diamond Bar population: 23.33% are White, 3.99% are Black or African American, 0.39% are American Indian and Alaska Native, 60.98% are Asian, 0.18% are Native Hawaiian and other Pacific Islander, 5.16% are some other race and 5.97% are multiracial.
Diamond Bar's racial breakdown clearly shows that there is an absolute majority of Asian population in the city.
By ethnicity, 9,829 is Hispanic or Latino (of any race), and 45,51 (82.24% of the total population) is Non-Hispanic.
The largest racial group in Diamond Bar is Asian with a population of 33,743 (60.98% of the total population).

Diamond Bar's population has already reached its peak and is showing a trend of decline:

The peak population was 58,293 in the year 2003
From 2000 to 2010, Diamond Bar's population decreased by 1,314 (2.31%), as compared to the national growth of 9.63%.
From 2010 to 2020, Diamond Bar's population decreased by 663 (1.19%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Diamond Bar's population was lowest in year 2022 at 52,855.