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ZIP CODE TABULATION AREA

21045

Maryland · 40,034 residents · 9.70 sq mi
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With 40,034 people, ZIP 21045 is a ZIP code in Howard County. This is an unusually credentialed place: 57% of adults have a four-year degree. There are 4,128 people per square mile. The median household earns $118,563, about 44% above the national median. 22% of residents were born outside the United States. Households here earn about 21% less than in Howard County as a whole. Among the 20 ZIP codes in Howard County, 21045 ranks 17th by median household income.

$118,563
US average: $82,259
$56,185
US average: $44,673
$453,700
US average: $376,019
56.6%
US average: 35.6%
Land area
9.70 sq mi
Age, sex & households
Under 18
22.7%
Age 65+
18.3%
48.0%
52.0%
2.59 people
Race & ethnicity · 2024
2024
White, non-Hispanic39.6%(15,839)
Black31%(12,409)
Hispanic / Latino12.8%(5,107)
Asian9.5%(3,812)
Other7.2%(2,867)
90
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Housing
3.8
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Within Howard County
Income rank vs other ZIPs
LOWEST17TH 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 21045?

ZIP code 21045 has about 40,034 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 21045?

The typical household in ZIP code 21045 earns about $118,563 a year. Half of households make more than that, and half make less.

Is ZIP code 21045 expensive?

In ZIP code 21045, the median home is worth about $453,700, and the typical rent is about $1,777 a month.

How educated are people in ZIP code 21045?

About 56.6% of adults age 25 and over in ZIP code 21045 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 21045?

About 8.6% of people in ZIP code 21045 live below the federal poverty line.

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