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ZIP CODE TABULATION AREA

21042

Maryland · 43,327 residents · 37.001 sq mi
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ZIP 21042 is significantly wealthier than the US average, with a median household income of $190,061. Population has held roughly steady since 2024. 73% of adults hold a bachelor's degree or higher, well above the national rate of 36%. Median home value is $706,400. With a median age of 45.1, the population is older than the US median of 38.9. Households here earn about 27% more than the Howard County median. Among the 20 ZIP codes in Howard County, 21042 ranks 10th by median household income.

$190,061
US average: $82,259
$706,400
US average: $376,019
72.9%
US average: 35.6%
Age, sex & households
Under 18
25.2%
Age 65+
19.9%
49.3%
50.7%
2.86 people
Race & ethnicity · 2024
2024
White, non-Hispanic55.7%(24,130)
Black6.2%(2,669)
Hispanic / Latino3.7%(1,607)
Asian29%(12,564)
Other5.4%(2,357)
Diversity Score74.7%(32,366)
Housing
Commute & vehicles
Work & employment
People & community
Affordability & inequality
Within Howard County
Income rank vs other ZIPs
LOWEST10TH 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 21042?

ZIP code 21042 has about 43,327 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 21042?

The typical household in ZIP code 21042 earns about $190,061 a year. Half of households make more than that, and half make less.

Is ZIP code 21042 expensive?

In ZIP code 21042, the median home is worth about $706,400, and the typical rent is about $2,183 a month.

How educated are people in ZIP code 21042?

About 72.9% of adults age 25 and over in ZIP code 21042 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 21042?

About 3.3% of people in ZIP code 21042 live below the federal poverty line.

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