Residential delivery area · Maryland
ZIP Code 21640: Henderson, MD
ZIP code 21640 uses the postal name Henderson, Maryland and lies mostly in Caroline County (80% of its land) with the rest in Queen Anne's County (Census 2020 ZIP-county file). About 1,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $53,558 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Henderson; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Henderson · its only residential ZIP
- County
- Caroline County (80%); Queen Anne's County (20%)
- Census places
- Henderson
- House district
- MD-1 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 25.7 sq mi · 45 people per sq mi
Where is ZIP code 21640?
21640 centers on 39.068°, -75.821° and covers 25.7 square miles of land plus 0.1 of water. It borders 9 ZIP codes: 21636, 21644, 21607, 19964, 21649, 21660, 21623, 19934, 21617.
The map draws ZIP code areas only. For the streets inside 21640, 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 21640 compare with the rest of Caroline County?
| Measure | 21640 | In Caroline County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 1,163 | 8th of 10 | 342nd of 477 |
| Median household income | $54k | 6th of 6 | 286th of 293 |
| Median home value | $269k | not ranked | not ranked |
21640's median home value is not ranked: its 90% margin of error (±$146,831) is more than a quarter of the figure ($268,500). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
Its median household income is higher than in 19% of U.S. residential ZIP codes, and it is denser than 40% of all 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 21640?
The 2020 Census counted 1,798 people in 21640; the ACS, which samples households over 2020-2024, estimates 1,163. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 1,163±220 (90% margin)
- 2020 Census count
- 1,798
- Households
- 511
- Median age
- 39.9
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 21640?
Of the 1,163 people the ACS estimates in 21640, 26.6% are under 18 and 24.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (78.1%), then Hispanic or Latino (20.9%).
- Under 1826.6%
- 18 to 6448.6%
- 65 and older24.8%
- White, not Hispanic78.1%
- Hispanic or Latino20.9%
- Other or two or more1.0%
- 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 21640 earn?
Median household income is $53,558 (ACS 2020-2024), the 6th highest of the 6 ranked ZIP codes in Caroline County.
- Median household income
- $53,558±$10,703
- Income per person
- $30,254
- Below the poverty line
- 7.2%
- Unemployed (of the labor force)
- 2.1%
- Adults 25+ with a bachelor's degree
- 13.9%
- Adjusted gross income per tax return, 2022
- $62,381750 returns; wages 72% 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 21640?
- Median home value (owners' estimate)
- $268,500
- Median gross rent
- –
- Homes owned by their occupants
- 92.4%
- Housing units
- 531
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 21640?
11 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in real estate and rental and leasing (ZIP Code Business Patterns).
- Real estate and rental and leasing3
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 21640?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21636 | Goldsboro | 1,097 | $73k | 3.9 mi |
| 21644 | Ingleside | 81 | – | 4.4 mi |
| 21607 | Barclay | 597 | $91k | 4.9 mi |
| 19964 | Marydel, DE | 1,418 | $99k | 5.5 mi |
| 21649 | Marydel | 1,890 | $69k | 5.7 mi |
| 21660 | Ridgely | 4,132 | $81k | 8.6 mi |
| 21623 | Church Hill | 2,669 | $78k | 8.7 mi |
| 19934 | Camden Wyoming, DE | 14,061 | $87k | 10.4 mi |
| 21617 | Centreville | 10,428 | $117k | 12.1 mi |
| 21639 | Greensboro | 4,682 | $63k | 7.8 mi (near) |
| 21668 | Sudlersville | 2,011 | $79k | 8.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.