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ZIP CODE TABULATION AREA

94521

California · 41,909 residents · 9.683 sq mi
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ZIP 94521 is significantly wealthier than the US average, with a median household income of $125,899. Population has held roughly steady since 2024. Median home value is $853,200. Poverty is rare here, at 5.2% of residents. Among the 42 ZIP codes in Contra Costa County, 94521 ranks 23rd by median household income.

$125,899
US average: $82,259
$853,200
US average: $376,019
44.6%
US average: 35.6%
Age, sex & households
Under 18
19.3%
Age 65+
19.2%
50.0%
50.0%
2.60 people
Race & ethnicity · 2024
2024
White, non-Hispanic51.3%(21,487)
Black5.4%(2,273)
Hispanic / Latino18.2%(7,627)
Asian15.1%(6,330)
Other10%(4,192)
Diversity Score83.5%(35,007)
Housing
Commute & vehicles
Work & employment
People & community
Affordability & inequality
Within Contra Costa County
Income rank vs other ZIPs
LOWEST23RD OF 42HIGHEST
Adjacent ZIPs
94505$146,480
94506$250,001
94507$250,001
94509$86,196
Frequently asked

How many people live in ZIP code 94521?

ZIP code 94521 has about 41,909 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 94521?

The typical household in ZIP code 94521 earns about $125,899 a year. Half of households make more than that, and half make less.

Is ZIP code 94521 expensive?

In ZIP code 94521, the median home is worth about $853,200, and the typical rent is about $2,404 a month.

How educated are people in ZIP code 94521?

About 44.6% of adults age 25 and over in ZIP code 94521 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 94521?

About 5.2% of people in ZIP code 94521 live below the federal poverty line.

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