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ZIP CODE TABULATION AREA

94021

California · 321 residents · 11.0 sq mi
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ZIP 94021 is home to 321 people in San Mateo County. Median household income runs $250,000+, well clear of the $82,259 US median. This is an unusually credentialed place: 71% of adults have a four-year degree. The typical home is worth $1,073,100. The median age is 46.8, about 8 years above the US median. That is roughly 57% ahead of the San Mateo County median. Among the 29 ZIP codes in San Mateo County, 94021 ranks 2nd by median household income.

$250,001
US average: $82,259
$114,055
US average: $44,673
$1,073,100
US average: $376,019
71.0%
US average: 35.6%
Land area
11.0 sq mi
Age, sex & households
Under 18
25.9%
Age 65+
27.7%
53.6%
46.4%
2.51 people
Race & ethnicity · 2024
2024
White, non-Hispanic91.3%(293)
Black0%(0)
Hispanic / Latino0%(0)
Asian8.7%(28)
Other0%(0)
20
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Housing
4.3
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Within San Mateo County
Income rank vs other ZIPs
LOWEST2ND OF 29HIGHEST
Adjacent ZIPs
94002$203,965
94005$156,169
94010$196,882
94014$122,966
Frequently asked

How many people live in ZIP code 94021?

ZIP code 94021 has about 321 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 94021?

The typical household in ZIP code 94021 earns about $250,001 a year. Half of households make more than that, and half make less.

Is ZIP code 94021 expensive?

In ZIP code 94021, the median home is worth about $1,073,100.

How educated are people in ZIP code 94021?

About 71.0% of adults age 25 and over in ZIP code 94021 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 94021?

About 0.0% of people in ZIP code 94021 live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR · ZCTA · UPDATED 2024