Siskiyou County, California

Siskiyou County population, land area and income

Siskiyou County had 42,498 residents in the Census Vintage 2024 estimate, on 6,278.8 square miles of land. It ranks 45th of 58 in California by population and 5th by land area. That works out to 6.8 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in California has 187,274 residents, so Siskiyou County has 23% of the typical county's population.

Its SAIPE 2023 median household income of $58,975 is below the national county median among 3,143 counties with an estimate.

How Siskiyou County's population changed since 2020

Siskiyou County lost 1,501 residents between the July 2020 and July 2024 estimates, a drop of 3.4%. That ranks 51st of 58 in California for growth. The median California county changed by -0.6%, and the state as a whole by -0.2%.

Since the April 2020 estimates base, Siskiyou County recorded 1,501 births and 2,717 deaths, a natural change of -1,216. Net international migration added +181 and net domestic migration, people moving to or from other US counties, came to -536. The largest single component was natural change, which removed 1,216 people.

Where Siskiyou County is

The Census internal point of Siskiyou County is at 41.588000, -122.533300. It sits in UTM zone 10N. The map shades California's 58 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Siskiyou County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Siskiyou County

5 incorporated places of 1,000+ people have residents in Siskiyou County, 16,231 people together, or 38% of the county. Each figure counts only the part of the town inside Siskiyou County; towns marked "part" extend into another county. The largest is Yreka with 7,686.

Counties bordering Siskiyou County

The Census 2024 county adjacency file lists 8 neighbors for Siskiyou County, including 3 across a state line. The most populous is Jackson County, OR, with 221,331 residents. Distances run between Census internal points in a straight line.

• OR

  Jackson County, OR

  221,331 people

  57 mi N

• Shasta County

  181,121 people

  63 mi SSE

• Humboldt County

  132,380 people

  95 mi SW

• OR

  Josephine County, OR

  88,276 people

  77 mi NW

• OR

  Klamath County, OR

  70,438 people

  88 mi NNE

• Del Norte County

  27,009 people

  76 mi W

• Trinity County

  15,642 people

  72 mi SSW

• Modoc County

  8,491 people

  94 mi E

Distance to Sacramento and the nearest big city

Sacramento is 215.2 miles SSE of Siskiyou County's internal point in a straight line. The nearest place of 100,000 or more is Chico, CA (population 102,911), 131.8 miles away. The nearest place of 10,000 or more is Ashland, OR (population 20,935), 42.6 miles away.

Siskiyou County FIPS code

The FIPS code of Siskiyou County is 06093: state code 06 for California plus county code 093. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $58,975.