Sonoma County Demographics

A map of Sonoma County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	280,966	285,792	57.9%	58.5%
Hispanic	145,518	141,438	30.0%	28.9%
Multiracial	24,169	24,599	5.0%	5.0%
Asian	21,090	22,239	4.3%	4.5%
Black	7,185	7,125	1.5%	1.5%
Native American/Other	6,112	7,670	1.3%	1.6%

Sonoma County, California has an estimated population of 485,040, a less than 1% change from the 488,863 recorded in the 2020 Census. The population is 57.9% White, 30.0% Hispanic, 5.0% Multiracial, 4.3% Asian, 1.5% Black, and 1.3% Native American/Other. This demographic dot map shows the population of Sonoma County, with one dot drawn for each person counted by the Census, color-coded by race.

Sonoma is about as racially diverse as it was in 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 Sonoma County, that probability was 57.0% in 2020 and 57.0% in the most recent ACS estimates.

Sonoma County is ranked the 17th most populous county in California, out of 58 counties. Sonoma County was ranked the 17th most populous county in the 2020 Census.

Sonoma County's White Population

280,966 residents of Sonoma County, or 57.9% of the population, identify as White. The share of White residents in Sonoma County is significantly higher than in California overall, where 33.8% of the population is White. Sonoma County ranks 25th statewide in terms of White residents as a share of the population, out of 58 counties.

Since the 2020 Census, Sonoma County's White population has declined by an estimated 1.7%. White residents' share of Sonoma County's population has decreased from 58.5% to 57.9%.

Sonoma County is more White than neighboring Napa County (48.6% White), San Francisco County (36.8% White), and Colusa County (29.8% White). Sonoma County is less White than neighboring Marin County (65.1% White), and Lake County (64% White).

Sonoma County's Black Population

7,185 residents of Sonoma County, or 1.5% of the population, identify as Black. The share of Black residents in Sonoma County is slightly lower than in California overall, where 5.2% of the population is Black. Sonoma County ranks 36th statewide in terms of Black residents as a share of the population, out of 58 counties.

Since the 2020 Census, Sonoma County's Black population has remained roughly the same. Black residents' share of Sonoma County's population has remained roughly unchanged at 1.5%.

Sonoma County is less Black than neighboring Marin County (2.1% Black), Napa County (1.7% Black), Lake County (2% Black), and San Francisco County (4.7% Black).

Sonoma County's Asian Population

21,090 residents of Sonoma County, or 4.3% of the population, identify as Asian. The share of Asian residents in Sonoma County is considerably lower than in California overall, where 15.3% of the population is Asian. Sonoma County ranks 30th statewide in terms of Asian residents as a share of the population, out of 58 counties.

Since the 2020 Census, Sonoma County's Asian population has declined by an estimated 5.2%. Asian residents' share of Sonoma County's population has remained roughly unchanged at 4.3%.

Sonoma County is more Asian than neighboring Lake County (1.4% Asian), and Colusa County (0.9% Asian). Sonoma County is less Asian than neighboring Marin County (6.1% Asian), Napa County (8.1% Asian), and San Francisco County (34.9% Asian).

Sonoma County's Hispanic Population

145,518 residents of Sonoma County, or 30.0% of the population, identify as Hispanic. The share of Hispanic residents in Sonoma County is considerably lower than in California overall, where 40.2% of the population is Hispanic. Sonoma County ranks 25th statewide in terms of Hispanic residents as a share of the population, out of 58 counties.

Since the 2020 Census, Sonoma County's Hispanic population has grown by an estimated 2.9%. Hispanic residents' share of Sonoma County's population has increased from 28.9% to 30.0%.

Sonoma County is more Hispanic than neighboring Marin County (19.5% Hispanic), Lake County (24.6% Hispanic), and San Francisco County (16.2% Hispanic). Sonoma County is less Hispanic than neighboring Napa County (36.4% Hispanic), and Colusa County (62.9% Hispanic).

Sonoma County's Native American/Other Population

6,112 residents of Sonoma County, or 1.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Sonoma County is comparable to the share in California overall, where 1.2% of the population is Native American/Other. Sonoma County ranks 32nd statewide in terms of Native American/Other residents as a share of the population, out of 58 counties.

Since the 2020 Census, Sonoma County's Native American/Other population has declined by an estimated 20.3%. Native American/Other residents' share of Sonoma County's population has remained roughly unchanged at 1.3%.

Sonoma County is more Native American/Other than neighboring Napa County (0.9% Native American/Other). Sonoma County is less Native American/Other than neighboring Marin County (1.4% Native American/Other), Lake County (2.3% Native American/Other), and Colusa County (2.4% Native American/Other).

Sonoma County's Multiracial Population

24,169 residents of Sonoma County, or 5.0% of the population, identify as Multiracial. The share of Multiracial residents in Sonoma County is comparable to the share in California overall, where 4.4% of the population is Multiracial. Sonoma County ranks 31st statewide in terms of Multiracial residents as a share of the population, out of 58 counties.

Since the 2020 Census, Sonoma County's Multiracial population has declined by an estimated 1.7%. Multiracial residents' share of Sonoma County's population has remained roughly unchanged at 5.0%.

Sonoma County is more Multiracial than neighboring Napa County (4.4% Multiracial), and Colusa County (2.5% Multiracial). Sonoma County is less Multiracial than neighboring Marin County (5.9% Multiracial), Lake County (5.6% Multiracial), and San Francisco County (6.1% 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.