ZIP Code 21875 — Delmar, MD
21875 is a standard (street delivery) ZIP code serving Delmar, Maryland, in Wicomico 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 21875 at a glance
| ZIP code | 21875 |
|---|---|
| Primary city | Delmar |
| State | Maryland (MD) |
| County | Wicomico FIPS 24045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 7,646 |
| Coordinates | 38.440380, -75.545590 |
How ZIP+4 works in 21875
The four digits after the hyphen encode a delivery segment inside 21875. 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 21875 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 21875.
| ZIP | City | Distance |
|---|---|---|
| 19940 | Delmar, DE | 2.8 mi |
| 21801 | Salisbury, MD | 6.6 mi |
| 21849 | Parsonsburg, MD | 6.7 mi |
| 19956 | Laurel, DE | 7.3 mi |
| 21804 | Salisbury, MD | 8.5 mi |
| 21826 | Fruitland, MD | 9.3 mi |
| 21850 | Pittsville, MD | 9.6 mi |
| 19931 | Bethel, DE | 9.6 mi |
| 21830 | Hebron, MD | 10.2 mi |
| 21874 | Willards, MD | 10.9 mi |
| 21861 | Sharptown, MD | 11.8 mi |
| 21837 | Mardela Springs, MD | 12.1 mi |
Questions about 21875
What is the ZIP+4 code for 21875?
21875 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 21875, you need to look up a specific street address to get them.
What city is 21875?
21875 is assigned to Delmar, Maryland, in Wicomico 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.