Colusa County's estimated 2026 population is 22,036 with a growth rate of -0.09% in the past year according to the most recent United States census data. Colusa County is the 50th largest county in California. The 2010 population was 21,435 and has seen a growth of 2.8% since that time.
Data after 2023 is projected based on recent change
The racial composition of Colusa County includes 51.2% White, 25.36% other race, and smaller percentages for Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
White (51.2%)
Other race (25.36%)
Two or more races (19.89%)
Black or African American (1.42%)
Native American (1.41%)
Asian (0.66%)
Native Hawaiian or Pacific Islander (0.06%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 11,210 | 51.2% |
| Other race | 5,553 | 25.36% |
| Two or more races | 4,354 | 19.89% |
| Black or African American | 311 | 1.42% |
| Native American | 308 | 1.41% |
| Asian | 145 | 0.66% |
| Native Hawaiian or Pacific Islander | 14 | 0.06% |
Married
Widowed
Divorced
Separated
Never Married
Colusa County's average per capita income is $45,193. Household income levels show a median of $75,149. The poverty rate stands at 10.8%.
Name | Median | Mean |
|---|---|---|
| Married Families | $100,662 | - |
| Families | $89,214 | $110,132 |
| Households | $75,149 | $93,585 |
| Non Families | $35,667 | $50,860 |
Average Income
Median Household Income
Poverty Rate