Siskiyou County's 2026 population is estimated at 41,612, reflecting a -1.05% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Siskiyou County is the 46th largest county in California. The 2010 population was 44,941 and has grown -7.41% since 2010.
Data after 2023 is projected based on recent change
Overall: 47.2 years
Female: 49.2 years
Male: 45.6 years
There are 34,776 adults, (12,101 of whom are seniors) in Siskiyou County.
Female: 21,731 (50%)
Male: 21,735 (50%)
The racial composition of Siskiyou County includes 77.47% White, 3.26% Native American, and smaller percentages for other race, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 33,672 | 77.47% |
| Two or more races | 5,511 | 12.68% |
| Native American | 1,417 | 3.26% |
| Other race | 1,292 | 2.97% |
| Asian | 800 | 1.84% |
| Black or African American | 592 | 1.36% |
| Native Hawaiian or Pacific Islander | 182 | 0.42% |
Siskiyou County 's average per capita income is $40,967. Household income levels show a median of $59,095. The poverty rate stands at 16.38%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $86,619 | $112,417 |
| Families | $74,427 | $101,256 |
| Households | $59,095 | $82,222 |
| Non Families | $33,049 | $48,090 |
Average Income
Median Household Income
Poverty Rate