Colusa County, California Demographics 2026

Demographic data: ACS 2020–2024 five-year estimates. Sources and methodology

Colusa County, California has a population of 21,984, the 50th most populous county in California. The median household income is $75,672 and the median home value is $393,400. The poverty rate is 11.4%.

Colusa County Quick Facts

Population 21,984

Median Household Income $75,67290% MOE ±$6,385

Median Home Value $393,40090% MOE ±$24,633

Poverty Rate 11.4%90% MOE ±3.0 pts

Unemployment Rate 9.8%90% MOE ±2.4 pts

Median Age 35.9 years90% MOE ±0.7 years

Homeownership Rate 62.2%90% MOE ±4.0 pts

Affordability Ratio 5.2x

Bachelor's Degree+ 16.4%90% MOE ±3.3 pts

Adults 25+ with high school education or higher 74.2%

Cities/Places 9

Population 21,984 50th of 58

Median Income $75,672 24% lower than state

Poverty Rate 11.4%

Unemployment 9.8%

How Colusa County Changed

Change from the non-overlapping 2015–2019 ACS period to 2020–2024. Earlier dollar figures are adjusted to 2024 dollars; changes marked “no clear change” are within the combined 90% margins of error.

Metric	2015–2019	2020–2024	Change
Population	21,454	21,984	+2.5%
Median household income	$73,105	$75,672	No clear change (+3.5%)
Median home value¹	$326,384	$393,400	+20.5%
Median gross rent	$1,094	$1,157	No clear change (+5.7%)

¹ The Census Bureau changed its home-value inflation adjustment beginning with the 2022 ACS; interpret that comparison with additional caution.

Median Household Income

Colusa

$75,672

$99,122

National

$80,734

Median Home Value

Colusa

$393,400

$734,700

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 20.0%

$25K-$50K 15.5%

$50K-$100K 31.5%

$100K+ 33.0%

Detailed income brackets

Under $10K

7.8%

$10K-$15K

3.3%

$15K-$20K

3.6%

$20K-$25K

5.2%

$25K-$30K

2.4%

$30K-$35K

4.0%

$35K-$40K

2.1%

$40K-$45K

4.4%

$45K-$50K

2.6%

$50K-$60K

4.6%

$60K-$75K

9.4%

$75K-$100K

17.5%

$100K-$125K

7.6%

$125K-$150K

6.8%

$150K-$200K

8.2%

$200K+

10.4%

Employment

9.8% Unemployment Rate State: 6.6%|National: 5.2%

63.0% Labor Force Participation

Housing Overview

Owner 62.2%

Renter 37.8%

Affordability Index Expensive

5.2x home value to income ratio

Median gross rent $1,157/mo 18.3% of median household income annually

People & Demographics

Age Distribution

Under 18

26.9%

18-34

21.3%

35-54

24.6%

55-74

21.1%

75+

6.0%

Race & Ethnicity

Diversity Index

Moderate Diversity

Moderate diversity with one or two groups making up the majority.

State average: 70 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Colusa County

City	Population	Median Income	Poverty	Home Value
Colusa	6,505	$71,250	18.1%	$375,000
Williams	5,585	$90,761	9.3%	$370,000
Arbuckle	3,093	$86,942	3.4%	$394,100
Maxwell	1,245	$67,768	20.5%	$281,900
College City	557	$67,206	0.0%	$453,600
Princeton	365	$53,750	3.0%	$295,800
Grimes	280	N/A	42.1%	N/A
Lodoga	259	$63,333	11.6%	$193,800
Stonyford	111	N/A	48.6%	$68,200

Explore California Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Colusa County is located in California with a total population of 21,984. It is the 50th most populous county out of 58 in California. The county encompasses 9 Census-designated places.

Age Demographics

The median age in Colusa County is 35.9 years. This is 5% lower than the state median of 37.9 years.

Economy, Income & Housing

The median household income in Colusa County is $75,672. This is 24% lower than the state median of $99,122. It is also 6% lower than the national median of $80,734. The poverty rate stands at 11.4%. This is 5% lower than the state poverty rate of 12.0%. The unemployment rate is 9.8%. This is 48% higher than the state rate of 6.6%. The median home value is $393,400. Housing costs are 46% lower than the state median of $734,700. The home-value-to-income ratio is 5.2x. 62.2% of occupied housing units are owner-occupied. This homeownership rate is 11% higher than the state average of 55.9%.

Race & Ethnicity

The largest racial or ethnic group in Colusa County is Hispanic or Latino, making up 62.9% of the population. White (non-Hispanic) residents account for 29.8%. The Black or African American population (1.5%) is well below the state average of 5.2%. The Hispanic or Latino population is significantly higher than the state average (62.9% vs 40.2%). The Asian population (0.9%) is well below the state average of 15.3%.

Education

16.4% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 56% lower than the state rate of 37.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 74.2%.

Data Sources & Methodology

All figures for Colusa County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against California and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of Colusa County, California?

Colusa County has a population of 21,984, making it the 50th most populous county in California.

What is the median income in Colusa County?

The median household income in Colusa County is $75,672 with a poverty rate of 11.4%.

How many cities are in Colusa County, California?

Colusa County contains 9 Census-designated places.