San Mateo, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of San Mateo, California is 103,555 as of the 2023 American Community Survey, making it the 72nd-largest city in California. The median household income is $152,669, the median home value is $1,563,200, and the median age is 38.0.
The population has grown 5.8% since 2010 (97,383 → 103,006).
103,555
Population
8534
People / sq mi
$152,669
Median Income
$1,563,200
Median Home Value
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San Mateo covers 12.1 sq mi of land at 8534 people per square mile.
About San Mateo, CA
Housing cost is the defining feature of San Mateo: the median home is valued at $1,563,200. With 103,555 residents, San Mateo is a city in California.
Households here are among the highest-earning of all US cities: median income is $152,669, above the US median of $78,538. Only 4.6% of residents live in poverty, below the national 12.4%. Real estate commands a premium here — a median home value of $1,563,200, with typical rent around $3,079.
About 57.6% of adults 25 and older have a bachelor’s degree, above the 35.0% national figure. Remote work is on the higher side at 22.3%, above the national 14.0%, and the average commute runs about 27 minutes each way.
High housing values reframe the income picture in San Mateo — even solid earnings stretch less against home prices and rents at this level.
San Mateo city Population History (2010-2024)
The city of San Mateo city had a population of 97,383 in 2010 and 103,006 in 2024, a 5.8% growth over 14 years. The peak was 105,658 in 2020. Average annual growth rate: 0.41%.
103,006
Population (2024)
97,383
Population (2010)
105,658
Peak (2020)
0.41%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 97,383 |
| 2011 | 98,518 |
| 2012 | 99,816 |
| 2013 | 101,323 |
| 2014 | 102,695 |
| 2015 | 103,509 |
| 2016 | 104,357 |
| 2017 | 104,389 |
| 2018 | 104,885 |
| 2019 | 104,430 |
| 2020 | 105,658 |
| 2021 | 102,900 |
| 2022 | 101,956 |
| 2023 | 102,098 |
| 2024 | 103,006 |
Race & Ethnicity
| White | 41.2% |
| Black or African American | 1.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.3% |
| Two or More Races | 0.1% |
Economy & Income
$152,669
Median Household Income
$80,312
Per Capita Income
4.6%
Poverty Rate
3.0%
Unemployment Rate
Housing
$1,563,200
Median Home Value
$3,079
Median Rent
50.8%
Owner-Occupied
Education
90.2%
High School+
57.6%
Bachelor's+
Commute
6.1%
Drive Alone
58.5%
Public Transit
22.3%
Work From Home
27.1 min
Avg Commute
Community Profile
15.5%
Foreign Born
54.9%
Non-English at Home
2.6%
Veterans
8.9%
With Disability
95.7%
Health Insurance
97.8%
Internet Access
Employment by Industry
| Finance, Insurance & Real Estate | 25.8% |
| Professional, Scientific & Management | 19.7% |
| Manufacturing | 7.9% |
| Information | 6.7% |
| Transportation & Warehousing | 6.3% |
| Education, Health Care & Social Services | 6.1% |
| Retail Trade | 5.1% |
| Construction | 4.8% |
| Arts, Entertainment & Food Services | 3.9% |
| Public Administration | 3.0% |
| Agriculture & Mining | 0.6% |
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Frequently Asked Questions
San Mateo, California has a population of 103,555 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 72nd-largest city in California.
The median household income in San Mateo, California is $152,669, with 4.6% of residents living below the federal poverty level.
The median home value in San Mateo, California is $1,563,200, with median monthly rent at $3,079 and a homeownership rate of 50.8%.
The median age in San Mateo, California is 38.0 years. The population is 49.6% male and 50.4% female.
The population has grown 5.8% since 2010 (97,383 → 103,006).
Where to stay in San Mateo
Visiting or relocating to San Mateo, CA? Compare hotels and short-term rentals across the metro — live availability and prices.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.