ZIP Code 25404 — Martinsburg, WV
25404 is a standard (street delivery) ZIP code serving Martinsburg, West Virginia, in Berkeley 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 25404 at a glance
| ZIP code | 25404 |
|---|---|
| Primary city | Martinsburg |
| State | West Virginia (WV) |
| County | Berkeley FIPS 54003 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 23,990 |
| Coordinates | 39.486310, -77.897820 |
How ZIP+4 works in 25404
The four digits after the hyphen encode a delivery segment inside 25404. 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 25404 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.
Other ZIP codes in Martinsburg
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 25404.
| ZIP | City | Distance |
|---|---|---|
| 25401 | Martinsburg, WV | 4.5 mi |
| 25443 | Shepherdstown, WV | 5.5 mi |
| 25403 | Martinsburg, WV | 5.8 mi |
| 25405 | Martinsburg, WV | 6.4 mi |
| 25419 | Falling Waters, WV | 6.7 mi |
| 21782 | Sharpsburg, MD | 7.6 mi |
| 21795 | Williamsport, MD | 7.6 mi |
| 21733 | Fairplay, MD | 8.6 mi |
| 25442 | Shenandoah Junction, WV | 8.7 mi |
| 21781 | Saint James, MD | 9.4 mi |
| 25430 | Kearneysville, WV | 10.3 mi |
| 25428 | Inwood, WV | 10.4 mi |
Questions about 25404
What is the ZIP+4 code for 25404?
25404 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 25404, you need to look up a specific street address to get them.
What city is 25404?
25404 is assigned to Martinsburg, West Virginia, in Berkeley 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.