Marin County's estimated 2025 population is 250,913 with a growth rate of -0.69% in the past year according to the most recent United States census data. Marin County is the 26th largest county in California. The 2010 population was 252,906 and has seen a growth of -0.79% since that time.
Data after 2023 is projected based on recent change
The racial composition of Marin County includes 70.44% White, 9.56% other race, 6.2% Asian, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 182,267 | 70.44% |
| Two or more races | 27,708 | 10.71% |
| Other race | 24,732 | 9.56% |
| Asian | 16,041 | 6.2% |
| Black or African American | 6,070 | 2.35% |
| Native American | 1,530 | 0.59% |
| Native Hawaiian or Pacific Islander | 417 | 0.16% |
Married
Widowed
Divorced
Separated
Never Married
Marin County's average per capita income is $81,883. Household income levels show a median of $142,785. The poverty rate stands at 7.83%.
Name | Median | Mean |
|---|---|---|
| Married Families | $218,358 | $311,556 |
| Families | $190,681 | $277,263 |
| Households | $142,785 | $224,140 |
| Non Families | $80,392 | $123,981 |
Average Income
Median Household Income
Poverty Rate