Lassen County, California

Lassen County population, land area and income

Lassen County had 28,340 residents in the Census Vintage 2024 estimate, on 4,541.4 square miles of land. It ranks 47th of 58 in California by population and 8th by land area. That works out to 6.2 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 Lassen County has 15% of the typical county's population.

Its SAIPE 2023 median household income of $77,743 is in the top quarter among 3,143 counties with an estimate.

How Lassen County's population changed since 2020

Lassen County lost 3,979 residents between the July 2020 and July 2024 estimates, a drop of 12.3%. That ranks 58th 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, Lassen County recorded 1,151 births and 1,203 deaths, a natural change of -52. Net international migration added +178 and net domestic migration, people moving to or from other US counties, came to -4,615. The largest single component was domestic migration, which removed 4,615 people.

Where Lassen County is

The Census internal point of Lassen County is at 40.715300, -120.621200. 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 Lassen County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Lassen County

One incorporated place of 1,000+ people has residents in Lassen County, 12,359 people together, or 44% of the county. Each figure counts only the part of the town inside Lassen County; towns marked "part" extend into another county. The largest is Susanville with 12,359.

Counties bordering Lassen County

The Census 2024 county adjacency file lists 5 neighbors for Lassen County, including 1 across a state line. The most populous is Washoe County, NV, with 507,280 residents. Distances run between Census internal points in a straight line.

• NV

  Washoe County, NV

  507,280 people

  50 mi E

• Shasta County

  181,121 people

  75 mi W

• Plumas County

  18,834 people

  51 mi SSW

• Modoc County

  8,491 people

  61 mi N

• Sierra County

  3,113 people

  79 mi S

Distance to Sacramento and the nearest big city

Sacramento is 154.9 miles SSW of Lassen County's internal point in a straight line. The nearest place of 100,000 or more is Reno, NV (population 281,714), 90.3 miles away. The nearest place of 10,000 or more is Susanville, CA (population 12,359), 19.4 miles away.

Lassen County FIPS code

The FIPS code of Lassen County is 06035: state code 06 for California plus county code 035. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $77,743.