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ZIP CODE TABULATION AREA

20684

Maryland · 802 residents · 8.34 sq mi
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ZIP 20684 is a ZIP code of 802 people in St. Mary's County. Owners hold 93% of the housing stock. The median household earns $180,060, about 119% above the national median. That is roughly 51% ahead of the St. Mary's County median. This is an unusually credentialed place: 50% of adults have a four-year degree. The median age is 44.2, about 5 years above the US median. Among the 17 ZIP codes in St. Mary's County, 20684 ranks 3rd by median household income.

$180,060
US average: $82,259
$71,244
US average: $44,673
$360,500
US average: $376,019
49.7%
US average: 35.6%
Land area
8.34 sq mi
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)
29
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Housing
2.0
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
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