Colusa County, California Demographics 2026
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%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Colusa County Quick Facts
How Colusa County Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 21,895 | 21,984 | +0.4% |
| Median household income | $75,149 | $75,672 | +0.7% |
| Median home value | $375,100 | $393,400 | +4.9% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
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
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.