ZIP code 21639
Where is ZIP code 21639?
Greensboro, Maryland
Caroline County · Standard ZIP code
ZIP code 21639 belongs to Greensboro, Maryland in Caroline County. 21639 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 4,682 people live in the 21639 area, where the median household income is $62,772. The closest ZIP codes are 21660 (Ridgely, 4.3 mi west), 21636 (Goldsboro, 4.3 mi north) and 21629 (Denton, 7.2 mi south).
| ZIP code | 21639 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Greensboro |
| State | Maryland (MD) |
| County | Caroline County |
| Time zone | Eastern Time · now |
| Area codes | 302, 410, 443, 667 |
| Coordinates | 38.9616, -75.8059 map |
| 3-digit prefix | 216 |
Population and income in 21639
| Population | 4,682 · lower than 51% of Maryland ZIP codes |
|---|---|
| People per square mile | 142 · lower than 71% of Maryland ZIP codes |
| Median age | 37.7 years · lower than 74% of Maryland ZIP codes |
| Men / women | 47% / 54% |
| Median household income | $62,772 · lower than 90% of Maryland ZIP codes |
| Income per person | $33,990 |
| Below the poverty line | 10% |
| Bachelor’s degree or higher | 14% of adults 25+ |
| Median home value | $269,400 · lower than 82% of Maryland ZIP codes |
| Median rent | $1,107 a month |
| Housing units | 1,916 |
| Households | 1,743 (2.67 people on average) |
| Owners / renters | 72% / 28% |
| Land area | 33.09 sq mi (plus 0.32 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21639. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21639
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21660 | Ridgely, MD | 4.3 mi W | Standard |
| 21636 | Goldsboro, MD | 4.3 mi N | Standard |
| 21629 | Denton, MD | 7.2 mi S | Standard |
| 21640 | Henderson, MD | 7.3 mi N | Standard |
| 21641 | Hillsboro, MD | 7.7 mi W | PO Box only |
| 21657 | Queen Anne, MD | 9.3 mi W | Standard |
| 21649 | Marydel, MD | 10.4 mi N | Standard |
| 19964 | Marydel, DE | 10.4 mi NE | Standard |
| 21644 | Ingleside, MD | 11.5 mi N | Standard |
| 21607 | Barclay, MD | 12 mi N | Standard |
| 19952 | Harrington, DE | 12.2 mi E | Standard |
| 21670 | Templeville, MD | 12.3 mi N | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21639 or measure the distance to another ZIP code.
How to address mail to 21639
123 MAIN ST
GREENSBORO MD 21639
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21639-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21639?
- 21639 is a Greensboro, Maryland ZIP code.
- What county is 21639 in?
- ZIP code 21639 is in Caroline County, Maryland.
- What time zone is ZIP code 21639 in?
- 21639 is in the Eastern Time zone (America/New_York).
- What area code is 21639?
- Phone numbers in ZIP code 21639 use area codes 302, 410, 443 and 667.
- What is the population of ZIP code 21639?
- About 4,682 people live in ZIP code 21639, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21639?
- The median household income in 21639 is $62,772 a year, lower than 90% of Maryland ZIP codes.
- What ZIP codes are near 21639?
- The nearest ZIP codes to 21639 are 21660 (Ridgely, 4.3 miles), 21636 (Goldsboro, 4.3 miles), 21629 (Denton, 7.2 miles) and 21640 (Henderson, 7.3 miles).