Contra Costa County, CA — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
1,161,458
Male
571,170
49.2%
Female
590,288
50.8%
Median Age
40.3 yrs
Avg Household Size
2.8
Foreign Born
26.2%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher31.4%
High School or Higher43.7%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
3.4%
Disability
0.0%
Non-English Home
7.3%
Married
43.7%
Contra Costa County, CA has a population of 1,161,458 according to 2023 Census Bureau estimates. The median age is 40.3 years. The largest racial or ethnic group is White at 43.5% of the population. 31.4% of residents hold a bachelor's degree or higher. 26.2% of residents are foreign-born.