San Mateo County, CA — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
745,100
Male
371,214
49.8%
Female
373,886
50.2%
Median Age
40.6 yrs
Avg Household Size
2.8
Foreign Born
35.6%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher38.7%
High School or Higher49.5%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
2.5%
Disability
0.0%
Non-English Home
7.1%
Married
44.7%
San Mateo County, CA has a population of 745,100 according to 2023 Census Bureau estimates. The median age is 40.6 years. The largest racial or ethnic group is White at 40.7% of the population. 38.7% of residents hold a bachelor's degree or higher. 35.6% of residents are foreign-born.