Mendocino County Demographics

A map of Mendocino County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	55,170	56,205	61.1%	61.4%
Hispanic	24,941	23,933	27.6%	26.1%
Multiracial	4,714	4,896	5.2%	5.3%
Native American/Other	2,978	4,230	3.3%	4.6%
Asian	1,895	1,730	2.1%	1.9%
Black	546	607	0.6%	0.7%

Mendocino County, California has an estimated population of 90,244, a slight decrease from the 91,601 recorded in the 2020 Census. The population is 61.1% White, 27.6% Hispanic, 5.2% Multiracial, 3.3% Native American/Other, 2.1% Asian, and 0.6% Black. This demographic dot map shows the population of Mendocino County, with one dot drawn for each person counted by the Census, color-coded by race.

Mendocino 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 Mendocino County, that probability was 55.0% in 2020 and 54.6% in the most recent ACS estimates.

Mendocino County is ranked the 38th most populous county in California, out of 58 counties. Mendocino County was ranked the 38th most populous county in the 2020 Census.

Mendocino County's White Population

55,170 residents of Mendocino County, or 61.1% of the population, identify as White. The share of White residents in Mendocino County is significantly higher than in California overall, where 33.8% of the population is White. Mendocino County ranks 22nd statewide in terms of White residents as a share of the population, out of 58 counties.

Since the 2020 Census, Mendocino County's White population has declined by an estimated 1.8%. White residents' share of Mendocino County's population has remained roughly unchanged at 61.1%.

Mendocino County is more White than neighboring Sonoma County (57.9% White), Glenn County (47.5% White), and Colusa County (29.8% White). Mendocino County is less White than neighboring Lake County (64% White), and Trinity County (77.4% White).

Mendocino County's Black Population

546 residents of Mendocino County, or 0.6% of the population, identify as Black. The share of Black residents in Mendocino County is slightly lower than in California overall, where 5.2% of the population is Black. Mendocino County ranks 49th statewide in terms of Black residents as a share of the population, out of 58 counties.

Since the 2020 Census, Mendocino County's Black population has declined by an estimated 10.0%. Black residents' share of Mendocino County's population has remained roughly unchanged at 0.6%.

Mendocino County is more Black than neighboring Glenn County (0.2% Black). Mendocino County is less Black than neighboring Lake County (2% Black), Sonoma County (1.5% Black), Colusa County (1.5% Black), and Trinity County (1.1% Black).

Mendocino County's Asian Population

1,895 residents of Mendocino County, or 2.1% of the population, identify as Asian. The share of Asian residents in Mendocino County is considerably lower than in California overall, where 15.3% of the population is Asian. Mendocino County ranks 42nd statewide in terms of Asian residents as a share of the population, out of 58 counties.

Since the 2020 Census, Mendocino County's Asian population has grown by an estimated 9.5%. Asian residents' share of Mendocino County's population has remained roughly unchanged at 2.1%.

Mendocino County is more Asian than neighboring Lake County (1.4% Asian), Colusa County (0.9% Asian), and Trinity County (0.6% Asian). Mendocino County is less Asian than neighboring Sonoma County (4.3% Asian), and Glenn County (3% Asian).

Mendocino County's Hispanic Population

24,941 residents of Mendocino County, or 27.6% of the population, identify as Hispanic. The share of Hispanic residents in Mendocino County is considerably lower than in California overall, where 40.2% of the population is Hispanic. Mendocino County ranks 31st statewide in terms of Hispanic residents as a share of the population, out of 58 counties.

Since the 2020 Census, Mendocino County's Hispanic population has grown by an estimated 4.2%. Hispanic residents' share of Mendocino County's population has increased from 26.1% to 27.6%.

Mendocino County is more Hispanic than neighboring Lake County (24.6% Hispanic), and Trinity County (6.1% Hispanic). Mendocino County is less Hispanic than neighboring Sonoma County (30% Hispanic), Glenn County (45% Hispanic), and Colusa County (62.9% Hispanic).

Mendocino County's Native American/Other Population

2,978 residents of Mendocino County, or 3.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Mendocino County is slightly higher than in California overall, where 1.2% of the population is Native American/Other. Mendocino County ranks 7th statewide in terms of Native American/Other residents as a share of the population, out of 58 counties.

Since the 2020 Census, Mendocino County's Native American/Other population has declined by an estimated 29.6%. Native American/Other residents' share of Mendocino County's population has decreased from 4.6% to 3.3%.

Mendocino County is more Native American/Other than neighboring Lake County (2.3% Native American/Other), Sonoma County (1.3% Native American/Other), Glenn County (0.9% Native American/Other), and Colusa County (2.4% Native American/Other). Mendocino County is less Native American/Other than neighboring Trinity County (7.9% Native American/Other).

Mendocino County's Multiracial Population

4,714 residents of Mendocino County, or 5.2% of the population, identify as Multiracial. The share of Multiracial residents in Mendocino County is comparable to the share in California overall, where 4.4% of the population is Multiracial. Mendocino County ranks 24th statewide in terms of Multiracial residents as a share of the population, out of 58 counties.

Since the 2020 Census, Mendocino County's Multiracial population has declined by an estimated 3.7%. Multiracial residents' share of Mendocino County's population has remained roughly unchanged at 5.2%.

Mendocino County is more Multiracial than neighboring Sonoma County (5% Multiracial), Glenn County (3.4% Multiracial), and Colusa County (2.5% Multiracial). Mendocino County is less Multiracial than neighboring Lake County (5.6% Multiracial), and Trinity County (6.9% 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.