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ZIP CODE TABULATION AREA

21104

Maryland · 6,052 residents · 17.1 sq mi
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With 6,052 people, ZIP 21104 is a ZIP code in Howard County. 97% of homes are owner-occupied. This is an unusually credentialed place: 64% of adults have a four-year degree. Households take in $191,804 a year at the median, 133% more than the country as a whole. The typical home is worth $680,200. The median age is 43.1, about 4 years above the US median. Among the 20 ZIP codes in Howard County, 21104 ranks 9th by median household income.

$191,804
US average: $82,259
$74,405
US average: $44,673
$680,200
US average: $376,019
64.4%
US average: 35.6%
Land area
17.1 sq mi
Age, sex & households
Under 18
20.7%
Age 65+
18.1%
50.0%
50.0%
2.88 people
Race & ethnicity · 2024
2024
White, non-Hispanic75.2%(4,554)
Black5.9%(360)
Hispanic / Latino1%(61)
Asian11.1%(672)
Other6.7%(405)
52
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Housing
3.5
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Within Howard County
Income rank vs other ZIPs
LOWEST9TH OF 20HIGHEST
Adjacent ZIPs
20701$85,594
20723$138,113
20759$250,001
20763$76,842
Frequently asked

How many people live in ZIP code 21104?

ZIP code 21104 has about 6,052 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 21104?

The typical household in ZIP code 21104 earns about $191,804 a year. Half of households make more than that, and half make less.

Is ZIP code 21104 expensive?

In ZIP code 21104, the median home is worth about $680,200, and the typical rent is about $1,384 a month.

How educated are people in ZIP code 21104?

About 64.4% of adults age 25 and over in ZIP code 21104 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 21104?

About 2.7% of people in ZIP code 21104 live below the federal poverty line.

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