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ZIP CODE TABULATION AREA

94521

California · 41,909 residents · 9.68 sq mi
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With 41,909 people, ZIP 94521 is a ZIP code in Contra Costa County. Median home value sits at $853,200. Median rent is $2,404 a month. There are 4,328 people per square mile. The median household earns $125,899, about 53% above the national median. At a median age of 42.9, this is an older place than the country as a whole. Among the 42 ZIP codes in Contra Costa County, 94521 ranks 23rd by median household income.

$125,899
US average: $82,259
$59,781
US average: $44,673
$853,200
US average: $376,019
44.6%
US average: 35.6%
Land area
9.68 sq mi
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)
84
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Housing
6.8
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
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