Marin County, CA — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
258,765
Male
127,100
49.1%
Female
131,665
50.9%
Median Age
47.3 yrs
Avg Household Size
2.4
Foreign Born
19.6%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher44.4%
High School or Higher52.3%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
3.1%
Disability
0.0%
Non-English Home
5.3%
Married
44.5%
Marin County, CA has a population of 258,765 according to 2023 Census Bureau estimates. The median age is 47.3 years. The largest racial or ethnic group is White at 70.4% of the population. 44.4% of residents hold a bachelor's degree or higher. 19.6% of residents are foreign-born.