Diamond Bar, CA Demographics

A map of Diamond Bar's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
Asian	33,316	32,626	62.4%	59.2%
Hispanic	9,291	10,803	17.4%	19.6%
White	6,276	8,117	11.8%	14.7%
Multiracial	2,156	1,495	4.0%	2.7%
Black	1,603	1,717	3.0%	3.1%
Native American/Other	713	314	1.3%	0.6%

Diamond Bar, California has an estimated population of 53,355, a decrease from the 55,072 recorded in the 2020 Census. The population is 62.4% Asian, 17.4% Hispanic, 11.8% White, 4.0% Multiracial, 3.0% Black, and 1.3% Native American/Other. This demographic dot map shows the population of Diamond Bar, with one dot drawn for each person counted by the Census, color-coded by race.

Diamond Bar has become less racially diverse since the 2020 Census. It is considerably less diverse than California overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Diamond Bar, that probability was 58.7% in 2020 and 56.3% in the most recent ACS estimates.

Diamond Bar is ranked the 174th most populous place in California, out of 1,618 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Diamond Bar was ranked the 168th most populous place in the 2020 Census.

Diamond Bar's White Population

6,276 residents of Diamond Bar, or 11.8% of the population, identify as White. The share of White residents in Diamond Bar is significantly lower than in California overall, where 33.8% of the population is White. Diamond Bar ranks 1366th statewide in terms of White residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Diamond Bar's White population has declined by an estimated 22.7%. White residents' share of Diamond Bar's population has decreased from 14.7% to 11.8%.

Diamond Bar is more White than neighboring Walnut (9.1% White), Pomona (9.4% White), Rowland Heights (6.3% White), and South San Jose Hills (2.8% White). Diamond Bar is less White than neighboring Brea (35.4% White).

Diamond Bar's Black Population

1,603 residents of Diamond Bar, or 3.0% of the population, identify as Black. The share of Black residents in Diamond Bar is slightly lower than in California overall, where 5.2% of the population is Black. Diamond Bar ranks 316th statewide in terms of Black residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Diamond Bar's Black population has declined by an estimated 6.6%. Black residents' share of Diamond Bar's population has remained roughly unchanged at 3.0%.

Diamond Bar is more Black than neighboring Walnut (1.9% Black), Rowland Heights (1.4% Black), Brea (1.6% Black), and South San Jose Hills (1.2% Black). Diamond Bar is less Black than neighboring Pomona (5.3% Black).

Diamond Bar's Asian Population

33,316 residents of Diamond Bar, or 62.4% of the population, identify as Asian. The share of Asian residents in Diamond Bar is significantly higher than in California overall, where 15.3% of the population is Asian. Diamond Bar ranks 14th statewide in terms of Asian residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Diamond Bar's Asian population has grown by an estimated 2.1%. Asian residents' share of Diamond Bar's population has increased from 59.2% to 62.4%.

Diamond Bar is more Asian than neighboring Pomona (10.6% Asian), Rowland Heights (60.8% Asian), Brea (27.7% Asian), and South San Jose Hills (11% Asian). Diamond Bar is less Asian than neighboring Walnut (68.7% Asian).

Diamond Bar's Hispanic Population

9,291 residents of Diamond Bar, or 17.4% of the population, identify as Hispanic. The share of Hispanic residents in Diamond Bar is significantly lower than in California overall, where 40.2% of the population is Hispanic. Diamond Bar ranks 875th statewide in terms of Hispanic residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Diamond Bar's Hispanic population has declined by an estimated 14.0%. Hispanic residents' share of Diamond Bar's population has decreased from 19.6% to 17.4%.

Diamond Bar is more Hispanic than neighboring Walnut (17.2% Hispanic). Diamond Bar is less Hispanic than neighboring Pomona (71.8% Hispanic), Rowland Heights (29.5% Hispanic), Brea (29.9% Hispanic), and South San Jose Hills (84.6% Hispanic).

Diamond Bar's Native American/Other Population

713 residents of Diamond Bar, or 1.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Diamond Bar is comparable to the share in California overall, where 1.2% of the population is Native American/Other. Diamond Bar ranks 1388th statewide in terms of Native American/Other residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Diamond Bar's Native American/Other population has grown by an estimated 127.1%. Native American/Other residents' share of Diamond Bar's population has increased from 0.6% to 1.3%.

Diamond Bar is more Native American/Other than neighboring Walnut (1.1% Native American/Other), Pomona (1% Native American/Other), Rowland Heights (0.9% Native American/Other), Brea (0.5% Native American/Other), and South San Jose Hills (0.1% Native American/Other).

Diamond Bar's Multiracial Population

2,156 residents of Diamond Bar, or 4.0% of the population, identify as Multiracial. The share of Multiracial residents in Diamond Bar is comparable to the share in California overall, where 4.4% of the population is Multiracial. Diamond Bar ranks 1219th statewide in terms of Multiracial residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Diamond Bar's Multiracial population has grown by an estimated 44.2%. Multiracial residents' share of Diamond Bar's population has increased from 2.7% to 4.0%.

Diamond Bar is more Multiracial than neighboring Walnut (1.9% Multiracial), Pomona (2% Multiracial), Rowland Heights (1.1% Multiracial), and South San Jose Hills (0.3% Multiracial). Diamond Bar is less Multiracial than neighboring Brea (4.9% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.