San Mateo, CA Census Data
Key demographic and economic indicators for San Mateo, California from the 2023 American Community Survey (ACS) 5-year estimates.
Updated: 2026-03-23 · Source: U.S. Census Bureau, ACS 2023
Population
103,555
49.6% male · 50.4% female
Median Age
38.0
0.7 below the national average (38.7 yrs)
Median Household Income
$152,669
74,131.0 above the national average ($78,538)
Bachelor's Degree or Higher
57.6%
22.6 above the national average (35.0%)
HS diploma or higher: 90.2%
Poverty Rate
7.9%
4.5 below the national average (12.4%)
Uninsured: 4.3%
Broadband Access
97.8%
8.1 above the national average (89.7%)
Median Home Value
$1,563,200
Median rent: $3,079 · 51% owner-occupied
Unemployment Rate
4.3%
Labor force participation: 66.6%
Demographics
Race & Ethnicity
Age Distribution
Commute to Work
San Mateo, CA Frequently Asked Questions
What is the population of San Mateo, CA?
The population of San Mateo, CA is 103,555 according to the 2023 American Community Survey 5-year estimates. The median age is 38.0 years.
What is the median household income in San Mateo?
The median household income in San Mateo, CA is $152,669, above the national average of $78,538. Per capita income is $82,877.
What is the poverty rate in San Mateo?
The poverty rate in San Mateo, CA is 7.9%, compared to the national average of 12.4%. About 4.3% of residents lack health insurance.
What percentage of San Mateo residents have a college degree?
57.6% of adults (25+) in San Mateo hold a bachelor's degree or higher, and 90.2% have at least a high school diploma. The national average for bachelor's degree holders is 35.0%.
What is the median home value in San Mateo?
The median home value in San Mateo, CA is $1,563,200. Median rent is $3,079 per month, with 51% of housing units owner-occupied.
What is the racial makeup of San Mateo?
San Mateo's population is 41.2% White, 1.5% Black, 26.8% Hispanic or Latino, and 27.1% Asian (source: 2023 ACS).