ZIP Code 26187 — Williamstown, WV
26187 is a standard (street delivery) ZIP code serving Williamstown, West Virginia, in Wood 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 26187 at a glance
| ZIP code | 26187 |
|---|---|
| Primary city | Williamstown |
| State | West Virginia (WV) |
| County | Wood FIPS 54107 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 6,060 |
| Coordinates | 39.367110, -81.448940 |
How ZIP+4 works in 26187
The four digits after the hyphen encode a delivery segment inside 26187. 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 26187 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 26187.
| ZIP | City | Distance |
|---|---|---|
| 45750 | Marietta, OH | 4.5 mi |
| 26105 | Vienna, WV | 4.7 mi |
| 26104 | Parkersburg, WV | 6.6 mi |
| 26184 | Waverly, WV | 7.1 mi |
| 45729 | Fleming, OH | 9.2 mi |
| 26134 | Belmont, WV | 9.3 mi |
| 45714 | Belpre, OH | 9.7 mi |
| 45768 | Newport, OH | 10.4 mi |
| 26142 | Davisville, WV | 10.5 mi |
| 45773 | Reno, OH | 10.6 mi |
| 45788 | Whipple, OH | 10.9 mi |
| 26101 | Parkersburg, WV | 11.4 mi |
Questions about 26187
What is the ZIP+4 code for 26187?
26187 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 26187, you need to look up a specific street address to get them.
What city is 26187?
26187 is assigned to Williamstown, West Virginia, in Wood 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.