Castro Valley, CA Demographics

A map of Castro Valley's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	21,775	24,412	33.5%	36.7%
Asian	21,354	20,174	32.9%	30.4%
Hispanic	12,866	12,822	19.8%	19.3%
Black	5,655	3,993	8.7%	6.0%
Multiracial	3,002	4,167	4.6%	6.3%
Native American/Other	349	873	0.5%	1.3%

Castro Valley, California has an estimated population of 65,001, a slight decrease from the 66,441 recorded in the 2020 Census. The population is 33.5% White, 32.9% Asian, 19.8% Hispanic, 8.7% Black, 4.6% Multiracial, and 0.5% Native American/Other. This demographic dot map shows the population of Castro Valley, with one dot drawn for each person counted by the Census, color-coded by race.

Castro Valley is about as racially diverse as it was in the 2020 Census. It is more 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 Castro Valley, that probability was 72.8% in 2020 and 73.1% in the most recent ACS estimates.

Castro Valley is ranked the 141st 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). Castro Valley was ranked the 139th most populous place in the 2020 Census.

Castro Valley's White Population

21,775 residents of Castro Valley, or 33.5% of the population, identify as White. The share of White residents in Castro Valley is comparable to the share in California overall, where 33.8% of the population is White. Castro Valley ranks 1095th statewide in terms of White residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castro Valley's White population has declined by an estimated 10.8%. White residents' share of Castro Valley's population has decreased from 36.7% to 33.5%.

Castro Valley is more White than neighboring Fairview (29.1% White), Cherryland (18.8% White), Ashland (11.1% White), San Lorenzo (18.2% White), and Norris Canyon (15.1% White).

Castro Valley's Black Population

5,655 residents of Castro Valley, or 8.7% of the population, identify as Black. The share of Black residents in Castro Valley is slightly higher than in California overall, where 5.2% of the population is Black. Castro Valley ranks 168th statewide in terms of Black residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castro Valley's Black population has grown by an estimated 41.6%. Black residents' share of Castro Valley's population has increased from 6.0% to 8.7%.

Castro Valley is more Black than neighboring Cherryland (7.5% Black), San Lorenzo (3.8% Black), and Norris Canyon (0% Black). Castro Valley is less Black than neighboring Fairview (12% Black), and Ashland (18.8% Black).

Castro Valley's Asian Population

21,354 residents of Castro Valley, or 32.9% of the population, identify as Asian. The share of Asian residents in Castro Valley is significantly higher than in California overall, where 15.3% of the population is Asian. Castro Valley ranks 75th statewide in terms of Asian residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castro Valley's Asian population has grown by an estimated 5.8%. Asian residents' share of Castro Valley's population has increased from 30.4% to 32.9%.

Castro Valley is more Asian than neighboring Fairview (21.2% Asian), Cherryland (14.5% Asian), Ashland (20.9% Asian), and San Lorenzo (31.3% Asian). Castro Valley is less Asian than neighboring Norris Canyon (61.5% Asian).

Castro Valley's Hispanic Population

12,866 residents of Castro Valley, or 19.8% of the population, identify as Hispanic. The share of Hispanic residents in Castro Valley is significantly lower than in California overall, where 40.2% of the population is Hispanic. Castro Valley ranks 883rd statewide in terms of Hispanic residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castro Valley's Hispanic population has remained roughly the same. Hispanic residents' share of Castro Valley's population has increased from 19.3% to 19.8%.

Castro Valley is more Hispanic than neighboring Norris Canyon (0% Hispanic). Castro Valley is less Hispanic than neighboring Fairview (27.6% Hispanic), Cherryland (52.3% Hispanic), Ashland (43.6% Hispanic), and San Lorenzo (42.1% Hispanic).

Castro Valley's Native American/Other Population

349 residents of Castro Valley, or 0.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Castro Valley is comparable to the share in California overall, where 1.2% of the population is Native American/Other. Castro Valley ranks 739th statewide in terms of Native American/Other residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castro Valley's Native American/Other population has declined by an estimated 60.0%. Native American/Other residents' share of Castro Valley's population has decreased from 1.3% to 0.5%.

Castro Valley is more Native American/Other than neighboring Norris Canyon (0% Native American/Other). Castro Valley is less Native American/Other than neighboring Fairview (0.8% Native American/Other), Cherryland (2.6% Native American/Other), Ashland (2.1% Native American/Other), and San Lorenzo (1.8% Native American/Other).

Castro Valley's Multiracial Population

3,002 residents of Castro Valley, or 4.6% of the population, identify as Multiracial. The share of Multiracial residents in Castro Valley is comparable to the share in California overall, where 4.4% of the population is Multiracial. Castro Valley ranks 401st statewide in terms of Multiracial residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castro Valley's Multiracial population has declined by an estimated 28.0%. Multiracial residents' share of Castro Valley's population has decreased from 6.3% to 4.6%.

Castro Valley is more Multiracial than neighboring Cherryland (4.2% Multiracial), Ashland (3.5% Multiracial), and San Lorenzo (2.8% Multiracial). Castro Valley is less Multiracial than neighboring Fairview (9.4% Multiracial), and Norris Canyon (23.4% 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.