Siskiyou County is a county of 43,466 people in California. The median age is 47.2, about 8 years above the US median. There are 7 people per square mile. Households here earn about 40% less than in California as a whole. Four-year degrees are less common here than nationally, at 23% of adults. 6% of people here were born outside the United States.
At a glance
Lower income
median household income $59,095, below the US median
US median: $82,259
Older
median age 47.2
US median: 38.9
Less educated
23% hold a bachelor's degree
US average: 36%
Less affordable
home values up 72%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Siskiyou County
What changed most since 1990
Median age37.2 → 47.2(+10.0 years)US over the same years: +6.0 years
Adults with a bachelor's degree14.2% → 23.3%(+9.2 pts)US over the same years: +15.3 pts
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)17.1%(556)
US avg: 26.4%
Gulf War (1990s)13.8%(449)
US avg: 24.3%
Vietnam era46.6%(1,512)
US avg: 33.1%
Korean War5.6%(183)
US avg: 4.5%
World War II1.4%(46)
US avg: 1%
Share of the 3,248 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Siskiyou County, decade by decade
Siskiyou County population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
43,531
$52,612
$162,485
14.2%
27.8
2000
44,301
$53,793
$179,980
17.7%
36.9
2010
44,900
$53,200
$341,517
22.6%
44.0
2020
44,076
$57,454
$259,740
22.1%
55.9
2024
43,466
$59,095
$309,500
23.3%
54.2
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
