Marin County Demographics

A map of Marin County's Population by Race

Marin County, California had a population of 262,321 in 2020. It was 66.0% White, 2.3% Black, 6.2% Asian, 18.8% Hispanic, 1.2% Native American/Other, and 5.5% Multiracial. This map presents the population of Marin County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Marin County is the 26th most populous county of the 58 counties in California.

Marin County's White Population

173,149 residents of Marin County identify as White, or 66.0%. This makes the White share of the population of Marin County considerably larger than the White share of the population of California (34.7% White). Of the 58 counties in California, Marin County is ranked #16 in terms of White residents as a share of the population.

Marin County is more White than neighboring San Francisco County (39.1% White), Sonoma County (58.5% White), Napa County (49.9% White), San Mateo County (36.1% White), and Contra Costa County (39.1% White).

Marin County's Black Population

6,120 residents of Marin County identify as Black, or 2.3%. This makes the Black share of the population of Marin County roughly similar to the Black share of the population of California (5.4% Black). Of the 58 counties in California, Marin County is ranked #22 in terms of Black residents as a share of the population.

Marin County is more Black than neighboring Sonoma County (1.5% Black), Napa County (1.7% Black), and San Mateo County (1.9% Black). Marin County is less Black than neighboring San Francisco County (5.2% Black), and Contra Costa County (8.4% Black).

Marin County's Asian Population

16,175 residents of Marin County identify as Asian, or 6.2%. This makes the Asian share of the population of Marin County slightly less than the Asian share of the population of California (15.1% Asian). Of the 58 counties in California, Marin County is ranked #23 in terms of Asian residents as a share of the population.

Marin County is more Asian than neighboring Sonoma County (4.5% Asian). Marin County is less Asian than neighboring San Francisco County (33.7% Asian), Napa County (7.6% Asian), San Mateo County (29.8% Asian), and Contra Costa County (18.4% Asian).

Marin County's Hispanic Population

49,410 residents of Marin County identify as Hispanic, or 18.8%. This makes the Hispanic share of the population of Marin County considerably less than the Hispanic share of the population of California (39.4% Hispanic). Of the 58 counties in California, Marin County is ranked #42 in terms of Hispanic residents as a share of the population.

Marin County is more Hispanic than neighboring San Francisco County (15.6% Hispanic). Marin County is less Hispanic than neighboring Sonoma County (28.9% Hispanic), Napa County (35.4% Hispanic), San Mateo County (25% Hispanic), and Contra Costa County (27% Hispanic).

Marin County's Native American/Other Population

3,052 residents of Marin County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.2%. This makes the Native American/Other share of the population of Marin 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, Marin County is ranked #49 in terms of Native American/Other residents as a share of the population.

Marin County is less Native American/Other than neighboring San Francisco County (1.3% Native American/Other), Sonoma County (1.6% Native American/Other), Napa County (1.3% Native American/Other), San Mateo County (2.1% Native American/Other), and Contra Costa County (1.4% Native American/Other).

Marin County's Multiracial Population

14,415 residents of Marin County identify as Multiracial, or 5.5%. This makes the Multiracial share of the population of Marin County roughly similar to the Multiracial share of the population of California (4.1% Multiracial). Of the 58 counties in California, Marin County is ranked #22 in terms of Multiracial residents as a share of the population.

Marin County is more Multiracial than neighboring San Francisco County (5.2% Multiracial), Sonoma County (5% Multiracial), Napa County (4.2% Multiracial), and San Mateo County (5.1% Multiracial). Marin County is less Multiracial than neighboring Contra Costa County (5.7% Multiracial).

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