Siskiyou County, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 45th-largest in California
The population of Siskiyou County, California is 43,834 as of the 2023 American Community Survey, making it the 45th-largest county in California. The median household income is $55,499, the median home value is $284,500, and the median age is 47.4.
The population of Siskiyou County has declined 5.4% since 2010 (44,941 → 42,498), a -0.40% annualized rate.
43,834
Population
-0.40%
Annual growth
7
People / sq mi
$55,499
Median Income
$284,500
Median Home Value
Siskiyou County covers 6,279 sq mi of land at 7.0 people per square mile.
About Siskiyou County, CA
Siskiyou County is a county in California with a population of 43,834. It ranks #45 among counties in California by population. The median age is 47.4, older than the national median. The population is 50.0% male and 50.0% female.
The median household income in Siskiyou County is $55,499, below the US median of $74,580. 11.6% of residents live below the federal poverty level. Home values sit at a median of $284,500, with monthly rent averaging $1,043. The homeownership rate of 69.7% is higher than the national rate of 64.8%.
Educational attainment in Siskiyou County reflects 23.1% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 10.2% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 20.3 minutes each way.
Siskiyou County Population History (2010-2024)
The county of Siskiyou County had a population of 44,941 in 2010 and 42,498 in 2024, a -5.4% growth over 14 years. The peak was 44,941 in 2010. Average annual growth rate: -0.40%.
42,498
Population (2024)
44,941
Population (2010)
44,941
Peak (2010)
-0.40%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 44,941 |
| 2011 | 44,622 |
| 2012 | 44,091 |
| 2013 | 43,550 |
| 2014 | 43,357 |
| 2015 | 43,275 |
| 2016 | 43,402 |
| 2017 | 43,647 |
| 2018 | 43,624 |
| 2019 | 43,663 |
| 2020 | 43,999 |
| 2021 | 44,144 |
| 2022 | 43,746 |
| 2023 | 42,941 |
| 2024 | 42,498 |
Race & Ethnicity
| White | 79.4% |
| Black or African American | 1.7% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 7.6% |
| Two or More Races | 0.0% |
Age & Sex
47.4
Median Age
50.0%
Female
50.0%
Male
27.2%
Age 65+
Age Distribution
Children (under 15): 16.6% · Seniors (65+): 27.2%
Income & Poverty
| Median household income | $55,499$-40,835 vs state |
| Mean household income | $76,699 |
| Per-capita income | $34,074 |
| Poverty rate | 11.6%+3.2% vs state |
| Unemployment rate | 3.9% |
| Employment-to-population | 46.5% |
Top Industries by Employment
The largest employment sector in Siskiyou County is professional & business services, accounting for 27.1% of workers.
How residents commute
0.8%
Drive alone
3.4%
Carpool
74.7%
Public transit
10.2%
Work from home
20.3 min
Avg commute
Housing
$284,500$-410,900 vs state
Median home value
$1,043
Median rent
69.7%
Homeownership rate
23,066
Total housing units
82.0%
Occupied
18.0%
Vacant
30.3%
Renter-occupied
Social & access
93.6%
With health insurance
92.6%
With broadband internet
28.8%
Foreign-born
10.4%
Veterans (18+)
17.5%
With a disability
90.3%
Speak language other than English at home
Education
91.1%
High School+
23.1%
Bachelor's+
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County rankings
Frequently Asked Questions
Siskiyou County, California has a population of 43,834 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 45th-largest county in California. Population density is 7 people per square mile.
The population of Siskiyou County has declined 5.4% since 2010 (44,941 → 42,498), a -0.40% annualized rate.
The median household income in Siskiyou County, California is $55,499, with mean (average) household income of $76,699 and per-capita income of $34,074. 11.6% of residents live below the federal poverty level.
In Siskiyou County, the largest racial and ethnic groups are White (79.4%), Hispanic or Latino (7.6%), Black or African American (1.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Siskiyou County, California is 47.4 years. Residents are 50.0% female and 50.0% male.
The median home value in Siskiyou County is $284,500 and median monthly rent is $1,043. 69.7% of occupied housing units are owner-occupied. The county has 23,066 total housing units, 18.0% of which are vacant.
The largest employment sector in Siskiyou County, California is professional, scientific, and management services, employing 27.1% of workers. The unemployment rate is 3.9%.
Los Angeles is among the largest cities associated with Siskiyou County, California, with a population of 3,857,897.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.