ZIP Code 25661 — Williamson, WV
25661 is a standard (street delivery) ZIP code serving Williamson, West Virginia, in Mingo 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 25661 at a glance
| ZIP code | 25661 |
|---|---|
| Primary city | Williamson |
| State | West Virginia (WV) |
| County | Mingo FIPS 54059 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,277 |
| Coordinates | 37.710620, -82.253770 |
How ZIP+4 works in 25661
The four digits after the hyphen encode a delivery segment inside 25661. 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 25661 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 25661.
| ZIP | City | Distance |
|---|---|---|
| 25667 | Chattaroy, WV | 1.1 mi |
| 41503 | South Williamson, KY | 3.8 mi |
| 41514 | Belfry, KY | 5 mi |
| 25690 | Ragland, WV | 5.6 mi |
| 25670 | Delbarton, WV | 5.7 mi |
| 41527 | Forest Hills, KY | 5.9 mi |
| 25685 | Naugatuck, WV | 6.7 mi |
| 25688 | North Matewan, WV | 7.2 mi |
| 25676 | Lenore, WV | 8 mi |
| 41531 | Hardy, KY | 8.1 mi |
| 41535 | Huddy, KY | 8.2 mi |
| 41544 | Mccarr, KY | 9 mi |
Questions about 25661
What is the ZIP+4 code for 25661?
25661 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 25661, you need to look up a specific street address to get them.
What city is 25661?
25661 is assigned to Williamson, West Virginia, in Mingo 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.