ZIP Code 98638 — Naselle, WA
98638 is a standard (street delivery) ZIP code serving Naselle, Washington, in Pacific 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 98638 at a glance
| ZIP code | 98638 |
|---|---|
| Primary city | Naselle |
| State | Washington (WA) |
| County | Pacific FIPS 53049 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 1,443 |
| Coordinates | 46.404700, -123.735880 |
How ZIP+4 works in 98638
The four digits after the hyphen encode a delivery segment inside 98638. 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 98638 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 98638.
| ZIP | City | Distance |
|---|---|---|
| 98643 | Rosburg, WA | 8.9 mi |
| 98621 | Grays River, WA | 9.1 mi |
| 98624 | Ilwaco, WA | 10.3 mi |
| 98614 | Chinook, WA | 11 mi |
| 98586 | South Bend, WA | 11.7 mi |
| 98631 | Long Beach, WA | 13.7 mi |
| 98527 | Bay Center, WA | 15.2 mi |
| 98647 | Skamokawa, WA | 15.4 mi |
| 98644 | Seaview, WA | 15.4 mi |
| 98577 | Raymond, WA | 17.6 mi |
| 98640 | Ocean Park, WA | 17.7 mi |
| 98641 | Oysterville, WA | 18.2 mi |
Questions about 98638
What is the ZIP+4 code for 98638?
98638 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 98638, you need to look up a specific street address to get them.
What city is 98638?
98638 is assigned to Naselle, Washington, in Pacific 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.