Siskiyou County Demographics

A map of Siskiyou County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	31,859	32,057	73.3%	72.7%
Hispanic	5,860	5,527	13.5%	12.5%
Multiracial	2,839	3,095	6.5%	7.0%
Native American/Other	1,545	2,060	3.6%	4.7%
Asian	784	866	1.8%	2.0%
Black	579	471	1.3%	1.1%

Siskiyou County, California has an estimated population of 43,466, a slight decrease from the 44,076 recorded in the 2020 Census. The population is 73.3% White, 13.5% Hispanic, 6.5% Multiracial, 3.6% Native American/Other, 1.8% Asian, and 1.3% Black. This demographic dot map shows the population of Siskiyou County, with one dot drawn for each person counted by the Census, color-coded by race.

Siskiyou has become slightly less racially diverse since 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 Siskiyou County, that probability was 44.8% in 2020 and 43.9% in the most recent ACS estimates.

Siskiyou County is ranked the 45th most populous county in California, out of 58 counties. Siskiyou County was ranked the 45th most populous county in the 2020 Census.

Siskiyou County's White Population

31,859 residents of Siskiyou County, or 73.3% of the population, identify as White. The share of White residents in Siskiyou County is significantly higher than in California overall, where 33.8% of the population is White. Siskiyou County ranks 11th statewide in terms of White residents as a share of the population, out of 58 counties.

Since the 2020 Census, Siskiyou County's White population has remained roughly the same. White residents' share of Siskiyou County's population has increased from 72.7% to 73.3%.

Siskiyou County is less White than neighboring Jackson County (76.8% White), Shasta County (75.3% White), Trinity County (77.4% White), Josephine County (82.9% White), and Klamath County (74.4% White).

Siskiyou County's Black Population

579 residents of Siskiyou County, or 1.3% of the population, identify as Black. The share of Black residents in Siskiyou County is slightly lower than in California overall, where 5.2% of the population is Black. Siskiyou County ranks 40th statewide in terms of Black residents as a share of the population, out of 58 counties.

Since the 2020 Census, Siskiyou County's Black population has grown by an estimated 22.9%. Black residents' share of Siskiyou County's population has remained roughly unchanged at 1.3%.

Siskiyou County is more Black than neighboring Jackson County (0.6% Black), Shasta County (0.8% Black), Trinity County (1.1% Black), Josephine County (0.4% Black), and Klamath County (0.7% Black).

Siskiyou County's Asian Population

784 residents of Siskiyou County, or 1.8% of the population, identify as Asian. The share of Asian residents in Siskiyou County is considerably lower than in California overall, where 15.3% of the population is Asian. Siskiyou County ranks 41st statewide in terms of Asian residents as a share of the population, out of 58 counties.

Since the 2020 Census, Siskiyou County's Asian population has declined by an estimated 9.5%. Asian residents' share of Siskiyou County's population has remained roughly unchanged at 1.8%.

Siskiyou County is more Asian than neighboring Jackson County (1% Asian), Trinity County (0.6% Asian), Josephine County (0.8% Asian), and Klamath County (0.9% Asian). Siskiyou County is less Asian than neighboring Shasta County (3.4% Asian).

Siskiyou County's Hispanic Population

5,860 residents of Siskiyou County, or 13.5% of the population, identify as Hispanic. The share of Hispanic residents in Siskiyou County is significantly lower than in California overall, where 40.2% of the population is Hispanic. Siskiyou County ranks 51st statewide in terms of Hispanic residents as a share of the population, out of 58 counties.

Since the 2020 Census, Siskiyou County's Hispanic population has grown by an estimated 6.0%. Hispanic residents' share of Siskiyou County's population has increased from 12.5% to 13.5%.

Siskiyou County is more Hispanic than neighboring Shasta County (11.8% Hispanic), Trinity County (6.1% Hispanic), and Josephine County (8.8% Hispanic). Siskiyou County is less Hispanic than neighboring Jackson County (14.6% Hispanic), and Klamath County (13.9% Hispanic).

Siskiyou County's Native American/Other Population

1,545 residents of Siskiyou County, or 3.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Siskiyou County is slightly higher than in California overall, where 1.2% of the population is Native American/Other. Siskiyou County ranks 6th statewide in terms of Native American/Other residents as a share of the population, out of 58 counties.

Since the 2020 Census, Siskiyou County's Native American/Other population has declined by an estimated 25.0%. Native American/Other residents' share of Siskiyou County's population has decreased from 4.7% to 3.6%.

Siskiyou County is more Native American/Other than neighboring Jackson County (0.9% Native American/Other), Shasta County (2% Native American/Other), Josephine County (1.3% Native American/Other), and Klamath County (3.2% Native American/Other). Siskiyou County is less Native American/Other than neighboring Trinity County (7.9% Native American/Other).

Siskiyou County's Multiracial Population

2,839 residents of Siskiyou County, or 6.5% of the population, identify as Multiracial. The share of Multiracial residents in Siskiyou County is slightly higher than in California overall, where 4.4% of the population is Multiracial. Siskiyou County ranks 5th statewide in terms of Multiracial residents as a share of the population, out of 58 counties.

Since the 2020 Census, Siskiyou County's Multiracial population has declined by an estimated 8.3%. Multiracial residents' share of Siskiyou County's population has decreased from 7.0% to 6.5%.

Siskiyou County is more Multiracial than neighboring Jackson County (6% Multiracial), and Josephine County (5.8% Multiracial). Siskiyou County is less Multiracial than neighboring Shasta County (6.7% Multiracial), Trinity County (6.9% Multiracial), and Klamath 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.