Colusa County Demographics

A map of Colusa County's Population by Race

Colusa County, California has an estimated population of 21,984, a less than 1% change from the 21,839 recorded in the 2020 Census. The population is 62.9% Hispanic, 29.8% White, 2.5% Multiracial, 2.4% Native American/Other, 1.5% Black, and 0.9% Asian. This demographic dot map shows the population of Colusa County, with one dot drawn for each person counted by the Census, color-coded by race.

Colusa 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 Colusa County, that probability was 51.7% in 2020 and 51.4% in the most recent ACS estimates.

Colusa County is ranked the 50th most populous county in California, out of 58 counties. Colusa County was ranked the 50th most populous county in the 2020 Census.

Colusa County's White Population

6,550 residents of Colusa County, or 29.8% of the population, identify as White. The share of White residents in Colusa County is slightly lower than in California overall, where 33.8% of the population is White. Colusa County ranks 44th statewide in terms of White residents as a share of the population, out of 58 counties.

Since the 2020 Census, Colusa County's White population has declined by an estimated 5.6%. White residents' share of Colusa County's population has decreased from 31.8% to 29.8%.

Colusa County is less White than neighboring Glenn County (47.5% White), Lake County (64% White), Sutter County (40.7% White), Yolo County (41.8% White), and Napa County (48.6% White).

Colusa County's Black Population

335 residents of Colusa County, or 1.5% of the population, identify as Black. The share of Black residents in Colusa County is slightly lower than in California overall, where 5.2% of the population is Black. Colusa County ranks 43rd statewide in terms of Black residents as a share of the population, out of 58 counties.

Since the 2020 Census, Colusa County's Black population has grown by an estimated 84.1%. Black residents' share of Colusa County's population has increased from 0.8% to 1.5%.

Colusa County is more Black than neighboring Glenn County (0.2% Black). Colusa County is less Black than neighboring Lake County (2% Black), Sutter County (1.6% Black), Yolo County (2.4% Black), and Napa County (1.7% Black).

Colusa County's Asian Population

201 residents of Colusa County, or 0.9% of the population, identify as Asian. The share of Asian residents in Colusa County is considerably lower than in California overall, where 15.3% of the population is Asian. Colusa County ranks 54th statewide in terms of Asian residents as a share of the population, out of 58 counties.

Since the 2020 Census, Colusa County's Asian population has declined by an estimated 20.2%. Asian residents' share of Colusa County's population has remained roughly unchanged at 0.9%.

Colusa County is less Asian than neighboring Glenn County (3% Asian), Lake County (1.4% Asian), Sutter County (17.5% Asian), Yolo County (14.9% Asian), and Napa County (8.1% Asian).

Colusa County's Hispanic Population

13,832 residents of Colusa County, or 62.9% of the population, identify as Hispanic. The share of Hispanic residents in Colusa County is significantly higher than in California overall, where 40.2% of the population is Hispanic. Colusa County ranks 4th statewide in terms of Hispanic residents as a share of the population, out of 58 counties.

Since the 2020 Census, Colusa County's Hispanic population has grown by an estimated 2.6%. Hispanic residents' share of Colusa County's population has increased from 61.7% to 62.9%.

Colusa County is more Hispanic than neighboring Glenn County (45% Hispanic), Lake County (24.6% Hispanic), Sutter County (32.9% Hispanic), Yolo County (33.4% Hispanic), and Napa County (36.4% Hispanic).

Colusa County's Native American/Other Population

519 residents of Colusa County, or 2.4% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Colusa County is comparable to the share in California overall, where 1.2% of the population is Native American/Other. Colusa County ranks 23rd statewide in terms of Native American/Other residents as a share of the population, out of 58 counties.

Since the 2020 Census, Colusa County's Native American/Other population has grown by an estimated 17.4%. Native American/Other residents' share of Colusa County's population has remained roughly unchanged at 2.4%.

Colusa County is more Native American/Other than neighboring Glenn County (0.9% Native American/Other), Lake County (2.3% Native American/Other), Sutter County (2.3% Native American/Other), Yolo County (1.4% Native American/Other), and Napa County (0.9% Native American/Other).

Colusa County's Multiracial Population

547 residents of Colusa County, or 2.5% of the population, identify as Multiracial. The share of Multiracial residents in Colusa County is comparable to the share in California overall, where 4.4% of the population is Multiracial. Colusa County ranks 56th statewide in terms of Multiracial residents as a share of the population, out of 58 counties.

Since the 2020 Census, Colusa County's Multiracial population has remained roughly the same. Multiracial residents' share of Colusa County's population has remained roughly unchanged at 2.5%.

Colusa County is less Multiracial than neighboring Glenn County (3.4% Multiracial), Lake County (5.6% Multiracial), Sutter County (5.1% Multiracial), Yolo County (6.1% Multiracial), and Napa County (4.4% 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.