Residential delivery area · Maryland
ZIP Code 21821: Dames Quarter (Deal Island), MD
ZIP code 21821 is in Dames Quarter (postal name Deal Island), Maryland, entirely in Somerset County (Census 2020 ZIP-county file). About 800 people live there (Census Bureau, ACS 2020-2024). Median household income is $60,341 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Dames Quarter (68%), Deal Island (21%) and Chance (11%).
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Deal Island · its only residential ZIP
- County
- Somerset County
- Census places
- Dames Quarter (68%) census-designated place; Deal Island (21%) census-designated place; Chance (11%) census-designated place
- Metro area
- Salisbury, MD
- House district
- MD-1 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 14.7 sq mi · 54 people per sq mi
Where is ZIP code 21821?
21821 centers on 38.165°, -75.917° and covers 14.7 square miles of land plus 5.1 of water. It borders 1 ZIP code: 21853.
The map draws ZIP code areas only. For the streets inside 21821, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 21821 compare with the rest of Somerset County?
| Measure | 21821 | In Somerset County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 797 | 8th of 11 | 365th of 477 |
| Median household income | $60k | not ranked | not ranked |
| Median home value | $188k | not ranked | not ranked |
21821's income and home value are not ranked: it has fewer than 1,000 residents (797). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 44% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 21821?
The 2020 Census counted 847 people in 21821; the ACS, which samples households over 2020-2024, estimates 797. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 797±201 (90% margin)
- 2020 Census count
- 847
- Households
- 375
- Median age
- 46.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 21821?
Of the 797 people the ACS estimates in 21821, 12.4% are under 18 and 30.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (93.5%).
- Under 1812.4%
- 18 to 6457.6%
- 65 and older30.0%
- White, not Hispanic93.5%
- Hispanic or Latino6.0%
- Other or two or more0.5%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 21821 earn?
Median household income is $60,341 (ACS 2020-2024).
- Median household income
- $60,341±$34,870
- Income per person
- $30,716
- Below the poverty line
- 19.2%
- Unemployed (of the labor force)
- 4.0%
- Adults 25+ with a bachelor's degree
- 11.0%
- Adjusted gross income per tax return, 2022
- $69,943370 returns; wages 48% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 21821?
- Median home value (owners' estimate)
- $188,200
- Median gross rent
- $1,615
- Homes owned by their occupants
- 83.2%
- Housing units
- 679
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 21821?
7 business establishments had a location in this ZIP code in 2023, 2 fewer than in 2018 (ZIP Code Business Patterns).
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 21821?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21853 | Princess Anne | 10,537 | $70k | 11.0 mi |
| 21840 | Nanticoke | 576 | – | 5.9 mi (near) |
| 21867 | Upper Fairmount | 60 | – | 7.7 mi (near) |
| 21627 | Crocheron | 26 | $96k | 8.5 mi (near) |
| 21814 | Bivalve | 217 | – | 8.9 mi (near) |
| 21865 | Tyaskin | 320 | $83k | 9.5 mi (near) |
| 21871 | Westover | 1,764 | $51k | 10.3 mi (near) |
| 21672 | Toddville | 161 | $83k | 10.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.