San Mateo County, CA Map
Official Census boundary of San Mateo County, California (FIPS 06081). Turn on flood zones, contours, land cover and school districts, measure distances, or click any spot to inspect it.
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San Mateo County Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
742,340
Households
264,419
Median household income
$158,855
Median age
40.9 years
Median home value
$1,559,600
Median gross rent
$2,922/mo
Owner-occupied homes
58.5%
Bachelor's degree or higher
53.7%
Below poverty level
6.7%
Land area
448.6 sq mi
Population density
1,655 / sq mi