ZIP Code 25187 — Southside, WV
25187 is a standard (street delivery) ZIP code serving Southside, West Virginia, in Mason 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 25187 at a glance
| ZIP code | 25187 |
|---|---|
| Primary city | Southside |
| State | West Virginia (WV) |
| County | Mason FIPS 54053 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 497 |
| Coordinates | 38.726170, -82.018780 |
How ZIP+4 works in 25187
The four digits after the hyphen encode a delivery segment inside 25187. 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 25187 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 25187.
| ZIP | City | Distance |
|---|---|---|
| 25106 | Henderson, WV | 4.9 mi |
| 25123 | Leon, WV | 6.3 mi |
| 25502 | Apple Grove, WV | 6.5 mi |
| 25515 | Gallipolis Ferry, WV | 7.5 mi |
| 25082 | Fraziers Bottom, WV | 8.1 mi |
| 25033 | Buffalo, WV | 9.4 mi |
| 25503 | Ashton, WV | 9.7 mi |
| 25550 | Point Pleasant, WV | 10.1 mi |
| 25264 | Mount Alto, WV | 11.1 mi |
| 25241 | Evans, WV | 12 mi |
| 25239 | Cottageville, WV | 12.7 mi |
| 25070 | Eleanor, WV | 13.2 mi |
Questions about 25187
What is the ZIP+4 code for 25187?
25187 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 25187, you need to look up a specific street address to get them.
What city is 25187?
25187 is assigned to Southside, West Virginia, in Mason 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.