San Dimas, CA Demographics

A map of San Dimas's Population by Race

San Dimas, California has an estimated population of 33,789, a decrease from the 34,924 recorded in the 2020 Census. The population is 40.9% Hispanic, 33.7% White, 16.3% Asian, 4.9% Multiracial, 3.4% Black, and 0.7% Native American/Other. This demographic dot map shows the population of San Dimas, with one dot drawn for each person counted by the Census, color-coded by race.

San Dimas has become more racially diverse since the 2020 Census. It is slightly 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 San Dimas, that probability was 67.3% in 2020 and 68.9% in the most recent ACS estimates.

San Dimas is ranked the 245th 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). San Dimas was ranked the 242nd most populous place in the 2020 Census.

San Dimas's White Population

11,389 residents of San Dimas, or 33.7% of the population, identify as White. The share of White residents in San Dimas is comparable to the share in California overall, where 33.8% of the population is White. San Dimas ranks 1057th statewide in terms of White residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Dimas's White population has declined by an estimated 20.2%. White residents' share of San Dimas's population has decreased from 40.9% to 33.7%.

San Dimas is more White than neighboring Charter Oak (21.6% White), Pomona (9.4% White), and Covina (19.2% White). San Dimas is less White than neighboring La Verne (43.3% White), and Glendora (40.1% White).

San Dimas's Black Population

1,152 residents of San Dimas, or 3.4% of the population, identify as Black. The share of Black residents in San Dimas is comparable to the share in California overall, where 5.2% of the population is Black. San Dimas ranks 284th statewide in terms of Black residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Dimas's Black population has declined by an estimated 4.0%. Black residents' share of San Dimas's population has remained roughly unchanged at 3.4%.

San Dimas is more Black than neighboring La Verne (3.1% Black), and Glendora (2.8% Black). San Dimas is less Black than neighboring Charter Oak (8.5% Black), Pomona (5.3% Black), and Covina (4.2% Black).

San Dimas's Asian Population

5,514 residents of San Dimas, or 16.3% of the population, identify as Asian. The share of Asian residents in San Dimas is comparable to the share in California overall, where 15.3% of the population is Asian. San Dimas ranks 208th statewide in terms of Asian residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Dimas's Asian population has grown by an estimated 13.3%. Asian residents' share of San Dimas's population has increased from 13.9% to 16.3%.

San Dimas is more Asian than neighboring La Verne (10.8% Asian), Charter Oak (14.3% Asian), Glendora (11.9% Asian), Pomona (10.6% Asian), and Covina (13.4% Asian).

San Dimas's Hispanic Population

13,828 residents of San Dimas, or 40.9% of the population, identify as Hispanic. The share of Hispanic residents in San Dimas is comparable to the share in California overall, where 40.2% of the population is Hispanic. San Dimas ranks 520th statewide in terms of Hispanic residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Dimas's Hispanic population has grown by an estimated 6.8%. Hispanic residents' share of San Dimas's population has increased from 37.1% to 40.9%.

San Dimas is more Hispanic than neighboring La Verne (36.3% Hispanic), and Glendora (39.7% Hispanic). San Dimas is less Hispanic than neighboring Charter Oak (52.1% Hispanic), Pomona (71.8% Hispanic), and Covina (59.4% Hispanic).

San Dimas's Native American/Other Population

248 residents of San Dimas, or 0.7% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in San Dimas is comparable to the share in California overall, where 1.2% of the population is Native American/Other. San Dimas ranks 1131st statewide in terms of Native American/Other residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Dimas's Native American/Other population has declined by an estimated 20.3%. Native American/Other residents' share of San Dimas's population has remained roughly unchanged at 0.7%.

San Dimas is more Native American/Other than neighboring Charter Oak (0.5% Native American/Other). San Dimas is less Native American/Other than neighboring La Verne (1.1% Native American/Other), Glendora (0.8% Native American/Other), Pomona (1% Native American/Other), and Covina (1.4% Native American/Other).

San Dimas's Multiracial Population

1,658 residents of San Dimas, or 4.9% of the population, identify as Multiracial. The share of Multiracial residents in San Dimas is comparable to the share in California overall, where 4.4% of the population is Multiracial. San Dimas ranks 1026th statewide in terms of Multiracial residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Dimas's Multiracial population has grown by an estimated 25.1%. Multiracial residents' share of San Dimas's population has increased from 3.8% to 4.9%.

San Dimas is more Multiracial than neighboring Charter Oak (3.1% Multiracial), Glendora (4.6% Multiracial), Pomona (2% Multiracial), and Covina (2.4% Multiracial). San Dimas is less Multiracial than neighboring La Verne (5.4% 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.