ZIP code 21641
Where is ZIP code 21641?
Hillsboro, Maryland
Caroline County · PO Box only ZIP code
ZIP code 21641 belongs to Hillsboro, Maryland in Caroline County. 21641 is a PO Box only ZIP code: it is used for post office boxes at the Hillsboro post office, not for street addresses. It is in the Eastern Time zone and uses area codes 410, 443 and 667. About 127 people live in the 21641 area, where the median household income is $66,875. The closest ZIP codes are 21657 (Queen Anne, 2.7 mi northwest), 21660 (Ridgely, 3.8 mi northeast) and 21625 (Cordova, 4.9 mi southwest).
| ZIP code | 21641 |
|---|---|
| Type | PO Box only (no street delivery) |
| Status | Active |
| City | Hillsboro |
| State | Maryland (MD) |
| County | Caroline County |
| Time zone | Eastern Time · now |
| Area codes | 410, 443, 667 |
| Coordinates | 38.9206, -75.9388 map |
| 3-digit prefix | 216 |
Population and income in 21641
| Population | 127 · lower than 95% of Maryland ZIP codes |
|---|---|
| People per square mile | 941 · higher than 64% of Maryland ZIP codes |
| Median age | 58.8 years · higher than 92% of Maryland ZIP codes |
| Men / women | 40% / 60% |
| Median household income | $66,875 · lower than 87% of Maryland ZIP codes |
| Income per person | $31,225 |
| Below the poverty line | 24% |
| Bachelor’s degree or higher | 16% of adults 25+ |
| Median home value | $254,200 · lower than 84% of Maryland ZIP codes |
| Median rent | $955 a month |
| Housing units | 70 |
| Households | 56 (2.27 people on average) |
| Owners / renters | 70% / 30% |
| Land area | 0.14 sq mi |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21641. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21641
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21657 | Queen Anne, MD | 2.7 mi NW | Standard |
| 21660 | Ridgely, MD | 3.8 mi NE | Standard |
| 21625 | Cordova, MD | 4.9 mi SW | Standard |
| 21629 | Denton, MD | 7 mi SE | Standard |
| 21679 | Wye Mills, MD | 7.7 mi W | Standard |
| 21639 | Greensboro, MD | 7.7 mi E | Standard |
| 21636 | Goldsboro, MD | 10.6 mi NE | Standard |
| 21617 | Centreville, MD | 11 mi NW | Standard |
| 21656 | Price, MD | 11.4 mi NW | PO Box only |
| 21690 | Chestertown, MD | 11.4 mi NW | Unique |
| 21655 | Preston, MD | 12.1 mi S | Standard |
| 21658 | Queenstown, MD | 12.3 mi NW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21641 or measure the distance to another ZIP code.
How to address mail to 21641
PO BOX 123
HILLSBORO MD 21641
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21641-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21641?
- 21641 is a Hillsboro, Maryland ZIP code.
- What county is 21641 in?
- ZIP code 21641 is in Caroline County, Maryland.
- What time zone is ZIP code 21641 in?
- 21641 is in the Eastern Time zone (America/New_York).
- What area code is 21641?
- Phone numbers in ZIP code 21641 use area codes 410, 443 and 667.
- What is the population of ZIP code 21641?
- About 127 people live in ZIP code 21641, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21641?
- The median household income in 21641 is $66,875 a year, lower than 87% of Maryland ZIP codes.
- Can I use 21641 for a street address?
- No. 21641 is only for PO Boxes. Street addresses in Hillsboro use another ZIP code.
- What ZIP codes are near 21641?
- The nearest ZIP codes to 21641 are 21657 (Queen Anne, 2.7 miles), 21660 (Ridgely, 3.8 miles), 21625 (Cordova, 4.9 miles) and 21629 (Denton, 7 miles).