ZIP Code 98643 — Rosburg, WA
98643 is a standard (street delivery) ZIP code serving Rosburg, Washington, in Wahkiakum 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 98643 at a glance
| ZIP code | 98643 |
|---|---|
| Primary city | Rosburg |
| State | Washington (WA) |
| County | Wahkiakum FIPS 53069 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 571 |
| Coordinates | 46.303260, -123.621170 |
How ZIP+4 works in 98643
The four digits after the hyphen encode a delivery segment inside 98643. 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 98643 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 98643.
| ZIP | City | Distance |
|---|---|---|
| 98621 | Grays River, WA | 7.7 mi |
| 98638 | Naselle, WA | 8.9 mi |
| 98647 | Skamokawa, WA | 8.9 mi |
| 97103 | Astoria, OR | 12.3 mi |
| 98614 | Chinook, WA | 13.5 mi |
| 98612 | Cathlamet, WA | 15.5 mi |
| 98624 | Ilwaco, WA | 15.7 mi |
| 97121 | Hammond, OR | 18.3 mi |
| 97146 | Warrenton, OR | 18.9 mi |
| 98631 | Long Beach, WA | 19.8 mi |
| 98644 | Seaview, WA | 20 mi |
| 98586 | South Bend, WA | 20.5 mi |
Questions about 98643
What is the ZIP+4 code for 98643?
98643 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 98643, you need to look up a specific street address to get them.
What city is 98643?
98643 is assigned to Rosburg, Washington, in Wahkiakum 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.