Contra Costa County's estimated 2026 population is 1,193,463 with a growth rate of 0.88% in the past year according to the most recent United States census data. Contra Costa County is the 9th largest county in California. The 2010 population was 1,052,516 and has seen a growth of 13.39% since that time.
Data after 2023 is projected based on recent change
The racial composition of Contra Costa County includes 43.5% White, 18.51% Asian, 13.67% other race, 8.47% Black or African American, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (43.5%)
Asian (18.51%)
Two or more races (14.52%)
Other race (13.67%)
Black or African American (8.47%)
Native American (0.86%)
Native Hawaiian or Pacific Islander (0.48%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 505,202 | 43.5% |
| Asian | 214,958 | 18.51% |
| Two or more races | 168,618 | 14.52% |
| Other race | 158,800 | 13.67% |
| Black or African American | 98,346 | 8.47% |
| Native American | 9,941 | 0.86% |
| Native Hawaiian or Pacific Islander | 5,593 | 0.48% |
Married
Widowed
Divorced
Separated
Never Married
Contra Costa County's average per capita income is $70,249. Household income levels show a median of $125,727. The poverty rate stands at 8.25%.
Name | Median | Mean |
|---|---|---|
| Married Families | $171,096 | $221,154 |
| Families | $146,002 | $193,231 |
| Households | $125,727 | $172,107 |
| Non Families | $74,035 | $107,958 |
Average Income
Median Household Income
Poverty Rate