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ZIP CODE TABULATION AREA

21784

Maryland · 39,258 residents · 56.1 sq mi
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With 39,258 people, ZIP 21784 is a ZIP code in Carroll County. Owners hold 87% of the housing stock. This is an unusually credentialed place: 53% of adults have a four-year degree. Households take in $139,395 a year at the median, 69% more than the country as a whole. The poverty rate is 4.4%, under the national 12.5%. 7% of residents were born outside the United States. Among the 9 ZIP codes in Carroll County, 21784 ranks 1st by median household income.

$139,395
US average: $82,259
$56,974
US average: $44,673
$491,800
US average: $376,019
53.0%
US average: 35.6%
Land area
56.1 sq mi
Age, sex & households
Under 18
25.3%
Age 65+
15.8%
50.0%
50.0%
2.84 people
Race & ethnicity · 2024
2024
White, non-Hispanic77%(30,218)
Black6.6%(2,604)
Hispanic / Latino6.8%(2,678)
Asian4.1%(1,626)
Other5.4%(2,132)
49
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 Carroll County
Income rank vs other ZIPs
LOWEST1ST OF 9HIGHEST
Adjacent ZIPs
21048$131,921
21074$108,536
21102$135,069
21157$104,966
Frequently asked

How many people live in ZIP code 21784?

ZIP code 21784 has about 39,258 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 21784?

The typical household in ZIP code 21784 earns about $139,395 a year. Half of households make more than that, and half make less.

Is ZIP code 21784 expensive?

In ZIP code 21784, the median home is worth about $491,800, and the typical rent is about $1,739 a month.

How educated are people in ZIP code 21784?

About 53.0% of adults age 25 and over in ZIP code 21784 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 21784?

About 4.4% of people in ZIP code 21784 live below the federal poverty line.

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