Sonoma County Demographics

A map of Sonoma County's Population by Race

Sonoma County, California had a population of 488,863 in 2020. It was 58.5% White, 1.5% Black, 4.5% Asian, 28.9% Hispanic, 1.6% Native American/Other, and 5.0% Multiracial. This map presents the population of Sonoma County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Sonoma County is the 17th most populous county of the 58 counties in California.

Sonoma County's White Population

285,792 residents of Sonoma County identify as White, or 58.5%. This makes the White share of the population of Sonoma County considerably larger than the White share of the population of California (34.7% White). Of the 58 counties in California, Sonoma County is ranked #25 in terms of White residents as a share of the population.

Sonoma County is more White than neighboring Napa County (49.9% White), San Francisco County (39.1% White), and Colusa County (31.8% White). Sonoma County is less White than neighboring Marin County (66% White), and Lake County (64.8% White).

Sonoma County's Black Population

7,125 residents of Sonoma County identify as Black, or 1.5%. This makes the Black share of the population of Sonoma County roughly similar to the Black share of the population of California (5.4% Black). Of the 58 counties in California, Sonoma County is ranked #36 in terms of Black residents as a share of the population.

Sonoma County is more Black than neighboring Colusa County (0.8% Black). Sonoma County is less Black than neighboring Marin County (2.3% Black), Napa County (1.7% Black), Lake County (1.7% Black), and San Francisco County (5.2% Black).

Sonoma County's Asian Population

22,239 residents of Sonoma County identify as Asian, or 4.5%. This makes the Asian share of the population of Sonoma County slightly less than the Asian share of the population of California (15.1% Asian). Of the 58 counties in California, Sonoma County is ranked #30 in terms of Asian residents as a share of the population.

Sonoma County is more Asian than neighboring Lake County (1.4% Asian), and Colusa County (1.2% Asian). Sonoma County is less Asian than neighboring Marin County (6.2% Asian), Napa County (7.6% Asian), and San Francisco County (33.7% Asian).

Sonoma County's Hispanic Population

141,438 residents of Sonoma County identify as Hispanic, or 28.9%. This makes the Hispanic share of the population of Sonoma County slightly less than the Hispanic share of the population of California (39.4% Hispanic). Of the 58 counties in California, Sonoma County is ranked #25 in terms of Hispanic residents as a share of the population.

Sonoma County is more Hispanic than neighboring Marin County (18.8% Hispanic), Lake County (22.7% Hispanic), and San Francisco County (15.6% Hispanic). Sonoma County is less Hispanic than neighboring Napa County (35.4% Hispanic), and Colusa County (61.7% Hispanic).

Sonoma County's Native American/Other Population

7,670 residents of Sonoma County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.6%. This makes the Native American/Other share of the population of Sonoma 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, Sonoma County is ranked #32 in terms of Native American/Other residents as a share of the population.

Sonoma County is more Native American/Other than neighboring Marin County (1.2% Native American/Other), Napa County (1.3% Native American/Other), and San Francisco County (1.3% Native American/Other). Sonoma County is less Native American/Other than neighboring Lake County (3.2% Native American/Other), and Colusa County (2% Native American/Other).

Sonoma County's Multiracial Population

24,599 residents of Sonoma County identify as Multiracial, or 5.0%. This makes the Multiracial share of the population of Sonoma County roughly similar to the Multiracial share of the population of California (4.1% Multiracial). Of the 58 counties in California, Sonoma County is ranked #31 in terms of Multiracial residents as a share of the population.

Sonoma County is more Multiracial than neighboring Napa County (4.2% Multiracial), and Colusa County (2.5% Multiracial). Sonoma County is less Multiracial than neighboring Marin County (5.5% Multiracial), Lake County (6.2% Multiracial), and San Francisco County (5.2% Multiracial).

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