ZIP Code 21613 — Cambridge, MD
21613 is a standard (street delivery) ZIP code serving Cambridge, Maryland, in Dorchester County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 21613 at a glance
| ZIP code | 21613 |
|---|---|
| Primary city | Cambridge |
| State | Maryland (MD) |
| County | Dorchester FIPS 24019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 17,926 |
| Coordinates | 38.495370, -76.071690 |
How ZIP+4 works in 21613
The four digits after the hyphen encode a delivery segment inside 21613. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 21613 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 21613.
| ZIP | City | Distance |
|---|---|---|
| 21677 | Woolford, MD | 6.2 mi |
| 21835 | Linkwood, MD | 7.7 mi |
| 21622 | Church Creek, MD | 8.2 mi |
| 21648 | Madison, MD | 8.8 mi |
| 21631 | East New Market, MD | 9.3 mi |
| 21664 | Secretary, MD | 10.3 mi |
| 21869 | Vienna, MD | 10.7 mi |
| 21626 | Crapo, MD | 10.8 mi |
| 21673 | Trappe, MD | 11 mi |
| 21669 | Taylors Island, MD | 11.8 mi |
| 21654 | Oxford, MD | 13.8 mi |
| 21675 | Wingate, MD | 14.2 mi |
Questions about 21613
What is the ZIP+4 code for 21613?
21613 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 21613, you need to look up a specific street address to get them.
What city is 21613?
21613 is assigned to Cambridge, Maryland, in Dorchester County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.