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ZIP CODE TABULATION AREA

20684

Maryland · 802 residents · 8.338 sq mi
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ZIP 20684 is significantly wealthier than the US average, with a median household income of $180,060. Population has held roughly steady since 2024. 50% of adults hold a bachelor's degree or higher. Median home value is $360,500. With a median age of 44.2, the population is older than the US median of 38.9. Households here earn about 51% more than the St. Mary's County median. Among the 17 ZIP codes in St. Mary's County, 20684 ranks 3rd by median household income.

$180,060
US average: $82,259
$360,500
US average: $376,019
49.7%
US average: 35.6%
Age, sex & households
Under 18
14.3%
Age 65+
20.6%
38.0%
62.0%
2.24 people
Race & ethnicity · 2024
2024
White, non-Hispanic86.8%(696)
Black1.1%(9)
Hispanic / Latino0.1%(1)
Asian0%(0)
Other12%(96)
Diversity Score29.1%(233)
Housing
Commute & vehicles
Work & employment
People & community
Affordability & inequality
Within St. Mary's County
Income rank vs other ZIPs
LOWEST3RD OF 17HIGHEST
Adjacent ZIPs
20606$88,262
20609$118,102
20618$105,508
20619$119,432
Frequently asked

How many people live in ZIP code 20684?

ZIP code 20684 has about 802 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 20684?

The typical household in ZIP code 20684 earns about $180,060 a year. Half of households make more than that, and half make less.

Is ZIP code 20684 expensive?

In ZIP code 20684, the median home is worth about $360,500.

How educated are people in ZIP code 20684?

About 49.7% of adults age 25 and over in ZIP code 20684 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 20684?

About 1.1% of people in ZIP code 20684 live below the federal poverty line.

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