Alum Rock, CA Demographics

A map of Alum Rock's Population by Race

Alum Rock, California has an estimated population of 10,440, a large decrease from the 12,042 recorded in the 2020 Census. The population is 63.6% Hispanic, 21.1% Asian, 12.0% White, 2.4% Native American/Other, 0.7% Multiracial, and 0.3% Black. This demographic dot map shows the population of Alum Rock, with one dot drawn for each person counted by the Census, color-coded by race.

Alum Rock has become more 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 Alum Rock, that probability was 50.5% in 2020 and 53.6% in the most recent ACS estimates.

Alum Rock is ranked the 488th 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). Alum Rock was ranked the 454th most populous place in the 2020 Census.

Alum Rock's White Population

1,248 residents of Alum Rock, or 12.0% of the population, identify as White. The share of White residents in Alum Rock is significantly lower than in California overall, where 33.8% of the population is White. Alum Rock ranks 1437th statewide in terms of White residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Alum Rock's White population has remained roughly the same. White residents' share of Alum Rock's population has increased from 10.3% to 12.0%.

Alum Rock is more White than neighboring Milpitas (10.1% White). Alum Rock is less White than neighboring East Foothills (27.7% White), San Jose (22.3% White), Burbank (32.9% White), and Fruitdale (51.5% White).

Alum Rock's Black Population

30 residents of Alum Rock, or 0.3% of the population, identify as Black. The share of Black residents in Alum Rock is slightly lower than in California overall, where 5.2% of the population is Black. Alum Rock ranks 661st statewide in terms of Black residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Alum Rock's Black population has declined by an estimated 78.4%. Black residents' share of Alum Rock's population has decreased from 1.2% to 0.3%.

Alum Rock is more Black than neighboring Fruitdale (0% Black). Alum Rock is less Black than neighboring East Foothills (1.9% Black), San Jose (2.7% Black), Milpitas (1.8% Black), and Burbank (1.6% Black).

Alum Rock's Asian Population

2,202 residents of Alum Rock, or 21.1% of the population, identify as Asian. The share of Asian residents in Alum Rock is higher than in California overall, where 15.3% of the population is Asian. Alum Rock ranks 153rd statewide in terms of Asian residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Alum Rock's Asian population has declined by an estimated 1.3%. Asian residents' share of Alum Rock's population has increased from 18.5% to 21.1%.

Alum Rock is more Asian than neighboring Burbank (14.3% Asian), and Fruitdale (17% Asian). Alum Rock is less Asian than neighboring East Foothills (37.6% Asian), San Jose (39.2% Asian), and Milpitas (71.5% Asian).

Alum Rock's Hispanic Population

6,637 residents of Alum Rock, or 63.6% of the population, identify as Hispanic. The share of Hispanic residents in Alum Rock is significantly higher than in California overall, where 40.2% of the population is Hispanic. Alum Rock ranks 261st statewide in terms of Hispanic residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Alum Rock's Hispanic population has declined by an estimated 17.8%. Hispanic residents' share of Alum Rock's population has decreased from 67.1% to 63.6%.

Alum Rock is more Hispanic than neighboring East Foothills (25% Hispanic), San Jose (30.8% Hispanic), Milpitas (13.4% Hispanic), Burbank (40% Hispanic), and Fruitdale (29.1% Hispanic).

Alum Rock's Native American/Other Population

251 residents of Alum Rock, or 2.4% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Alum Rock is comparable to the share in California overall, where 1.2% of the population is Native American/Other. Alum Rock ranks 888th statewide in terms of Native American/Other residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Alum Rock's Native American/Other population has grown by an estimated 84.6%. Native American/Other residents' share of Alum Rock's population has increased from 1.1% to 2.4%.

Alum Rock is more Native American/Other than neighboring East Foothills (1% Native American/Other), San Jose (1.2% Native American/Other), Milpitas (0.6% Native American/Other), Burbank (1.1% Native American/Other), and Fruitdale (0.9% Native American/Other).

Alum Rock's Multiracial Population

72 residents of Alum Rock, or 0.7% of the population, identify as Multiracial. The share of Multiracial residents in Alum Rock is slightly lower than in California overall, where 4.4% of the population is Multiracial. Alum Rock ranks 1349th statewide in terms of Multiracial residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Alum Rock's Multiracial population has declined by an estimated 67.6%. Multiracial residents' share of Alum Rock's population has decreased from 1.8% to 0.7%.

Alum Rock is less Multiracial than neighboring East Foothills (6.9% Multiracial), San Jose (3.8% Multiracial), Milpitas (2.6% Multiracial), Burbank (10.1% Multiracial), and Fruitdale (1.4% 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.