Alameda County Demographics

A map of Alameda County's Population by Race

Alameda County, California had a population of 1,682,353 in 2020. It was 28.1% White, 9.5% Black, 32.1% Asian, 23.4% Hispanic, 1.7% Native American/Other, and 5.3% Multiracial. This map presents the population of Alameda County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Alameda County is the 7th most populous county of the 58 counties in California.

Alameda County's White Population

472,277 residents of Alameda County identify as White, or 28.1%. This makes the White share of the population of Alameda County slightly less than the White share of the population of California (34.7% White). Of the 58 counties in California, Alameda County is ranked #50 in terms of White residents as a share of the population.

Alameda County is less White than neighboring Contra Costa County (39.1% White), Santa Clara County (28.7% White), San Mateo County (36.1% White), Solano County (34.2% White), and Santa Cruz County (53.7% White).

Alameda County's Black Population

159,499 residents of Alameda County identify as Black, or 9.5%. This makes the Black share of the population of Alameda County roughly similar to the Black share of the population of California (5.4% Black). Of the 58 counties in California, Alameda County is ranked #2 in terms of Black residents as a share of the population.

Alameda County is more Black than neighboring Contra Costa County (8.4% Black), Santa Clara County (2.2% Black), San Mateo County (1.9% Black), and Santa Cruz County (1.1% Black). Alameda County is less Black than neighboring Solano County (13.2% Black).

Alameda County's Asian Population

540,511 residents of Alameda County identify as Asian, or 32.1%. This makes the Asian share of the population of Alameda County larger than the Asian share of the population of California (15.1% Asian). Of the 58 counties in California, Alameda County is ranked #3 in terms of Asian residents as a share of the population.

Alameda County is more Asian than neighboring Contra Costa County (18.4% Asian), San Mateo County (29.8% Asian), Solano County (15.6% Asian), and Santa Cruz County (4.5% Asian). Alameda County is less Asian than neighboring Santa Clara County (38.9% Asian).

Alameda County's Hispanic Population

393,749 residents of Alameda County identify as Hispanic, or 23.4%. This makes the Hispanic share of the population of Alameda County less than the Hispanic share of the population of California (39.4% Hispanic). Of the 58 counties in California, Alameda County is ranked #36 in terms of Hispanic residents as a share of the population.

Alameda County is less Hispanic than neighboring Contra Costa County (27% Hispanic), Santa Clara County (25.2% Hispanic), San Mateo County (25% Hispanic), Solano County (28.3% Hispanic), and Santa Cruz County (34.8% Hispanic).

Alameda County's Native American/Other Population

27,780 residents of Alameda County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.7%. This makes the Native American/Other share of the population of Alameda County roughly similar to the Native American/Other share of the population of California (1.3% Native American/Other). Of the 58 counties in California, Alameda County is ranked #29 in terms of Native American/Other residents as a share of the population.

Alameda County is more Native American/Other than neighboring Contra Costa County (1.4% Native American/Other), Santa Clara County (1% Native American/Other), and Santa Cruz County (1% Native American/Other). Alameda County is less Native American/Other than neighboring San Mateo County (2.1% Native American/Other), and Solano County (1.8% Native American/Other).

Alameda County's Multiracial Population

88,537 residents of Alameda County identify as Multiracial, or 5.3%. This makes the Multiracial share of the population of Alameda County roughly similar to the Multiracial share of the population of California (4.1% Multiracial). Of the 58 counties in California, Alameda County is ranked #25 in terms of Multiracial residents as a share of the population.

Alameda County is more Multiracial than neighboring Santa Clara County (4% Multiracial), San Mateo County (5.1% Multiracial), and Santa Cruz County (4.9% Multiracial). Alameda County is less Multiracial than neighboring Contra Costa County (5.7% Multiracial), and Solano County (6.8% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.