Colusa County, California

Colusa County population, land area and income

Colusa County had 22,074 residents in the Census Vintage 2024 estimate, on 1,150.7 square miles of land. It ranks 50th of 58 in California by population and 39th by land area. That works out to 19.2 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in California has 187,274 residents, so Colusa County has 12% of the typical county's population.

Its SAIPE 2023 median household income of $66,675 is above the national county median among 3,143 counties with an estimate.

How Colusa County's population changed since 2020

Colusa County gained 206 residents between the July 2020 and July 2024 estimates, a rise of 0.9%. That ranks 18th 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, Colusa County recorded 1,191 births and 797 deaths, a natural change of +394. Net international migration added +198 and net domestic migration, people moving to or from other US counties, came to -371. The largest single component was natural change, which added 394 people.

Where Colusa County is

The Census internal point of Colusa County is at 39.177700, -122.237600. 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 Colusa County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Colusa County

2 incorporated places of 1,000+ people have residents in Colusa County, 12,187 people together, or 55% of the county. Each figure counts only the part of the town inside Colusa County; towns marked "part" extend into another county. The largest is Colusa with 6,589.

Counties bordering Colusa County

The Census 2024 county adjacency file lists 5 neighbors for Colusa County. The most populous is Yolo County, CA, with 225,251 residents. Distances run between Census internal points in a straight line.

• Yolo County

  225,251 people

  39 mi SSE

• Butte County

  208,334 people

  48 mi NE

• Sutter County

  98,545 people

  30 mi ESE

• Lake County

  67,764 people

  28 mi W

• Glenn County

  28,304 people

  31 mi NNW

Distance to Sacramento and the nearest big city

Sacramento is 57.6 miles SE of Colusa County's internal point in a straight line. The nearest place of 100,000 or more is Chico, CA (population 102,911), 46.0 miles away. The nearest place of 10,000 or more is Clearlake, CA (population 16,636), 26.0 miles away.

Colusa County FIPS code

The FIPS code of Colusa County is 06011: state code 06 for California plus county code 011. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $66,675.