ZIP code 21640
Where is ZIP code 21640?
Henderson, Maryland
Caroline County · Standard ZIP code
ZIP code 21640 belongs to Henderson, Maryland in Caroline County. 21640 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 302, 410, 443 and 667. About 1,163 people live in the 21640 area, where the median household income is $53,558. The closest ZIP codes are 21636 (Goldsboro, 3.1 mi south), 21649 (Marydel, 3.3 mi northeast) and 19964 (Marydel, 4.2 mi northeast).
| ZIP code | 21640 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Henderson |
| State | Maryland (MD) |
| County | Caroline County |
| Time zone | Eastern Time · now |
| Area codes | 302, 410, 443, 667 |
| Coordinates | 39.0672, -75.7948 map |
| 3-digit prefix | 216 |
Population and income in 21640
| Population | 1,163 · lower than 73% of Maryland ZIP codes |
|---|---|
| People per square mile | 45 · lower than 89% of Maryland ZIP codes |
| Median age | 39.9 years · lower than 62% of Maryland ZIP codes |
| Men / women | 48% / 52% |
| Median household income | $53,558 · lower than 96% of Maryland ZIP codes |
| Income per person | $30,254 |
| Below the poverty line | 7.2% |
| Bachelor’s degree or higher | 14% of adults 25+ |
| Median home value | $268,500 · lower than 82% of Maryland ZIP codes |
| Housing units | 531 |
| Households | 511 (2.28 people on average) |
| Owners / renters | 92% / 7.6% |
| Land area | 25.66 sq mi (plus 0.08 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21640. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21640
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21636 | Goldsboro, MD | 3.1 mi S | Standard |
| 21649 | Marydel, MD | 3.3 mi NE | Standard |
| 19964 | Marydel, DE | 4.2 mi NE | Standard |
| 21670 | Templeville, MD | 5 mi N | PO Box only |
| 21607 | Barclay, MD | 5.6 mi NW | Standard |
| 21644 | Ingleside, MD | 5.6 mi NW | Standard |
| 21639 | Greensboro, MD | 7.3 mi S | Standard |
| 19953 | Hartly, DE | 8.1 mi NE | Standard |
| 21668 | Sudlersville, MD | 8.5 mi N | Standard |
| 21660 | Ridgely, MD | 9 mi SW | Standard |
| 19934 | Camden Wyoming, DE | 9.9 mi E | Standard |
| 21623 | Church Hill, MD | 11.7 mi NW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21640 or measure the distance to another ZIP code.
How to address mail to 21640
123 MAIN ST
HENDERSON MD 21640
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21640-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21640?
- 21640 is a Henderson, Maryland ZIP code.
- What county is 21640 in?
- ZIP code 21640 is in Caroline County, Maryland.
- What time zone is ZIP code 21640 in?
- 21640 is in the Eastern Time zone (America/New_York).
- What area code is 21640?
- Phone numbers in ZIP code 21640 use area codes 302, 410, 443 and 667.
- What is the population of ZIP code 21640?
- About 1,163 people live in ZIP code 21640, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21640?
- The median household income in 21640 is $53,558 a year, lower than 96% of Maryland ZIP codes.
- What ZIP codes are near 21640?
- The nearest ZIP codes to 21640 are 21636 (Goldsboro, 3.1 miles), 21649 (Marydel, 3.3 miles), 19964 (Marydel, 4.2 miles) and 21670 (Templeville, 5 miles).