ZIP Code 98579 — Rochester, WA
98579 is a standard (street delivery) ZIP code serving Rochester, Washington, in Thurston 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 98579 at a glance
| ZIP code | 98579 |
|---|---|
| Primary city | Rochester |
| State | Washington (WA) |
| County | Thurston FIPS 53067 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 14,048 |
| Coordinates | 46.794060, -123.119520 |
How ZIP+4 works in 98579
The four digits after the hyphen encode a delivery segment inside 98579. 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 98579 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 98579.
| ZIP | City | Distance |
|---|---|---|
| 98544 | Galvin, WA | 5.8 mi |
| 98556 | Littlerock, WA | 6.4 mi |
| 98568 | Oakville, WA | 9.9 mi |
| 98531 | Centralia, WA | 10.5 mi |
| 98532 | Chehalis, WA | 11.6 mi |
| 98512 | Olympia, WA | 11.6 mi |
| 98530 | Bucoda, WA | 11.9 mi |
| 98539 | Doty, WA | 13 mi |
| 98589 | Tenino, WA | 14.5 mi |
| 98559 | Malone, WA | 15 mi |
| 98501 | Olympia, WA | 17.3 mi |
| 98565 | Napavine, WA | 18 mi |
Questions about 98579
What is the ZIP+4 code for 98579?
98579 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 98579, you need to look up a specific street address to get them.
What city is 98579?
98579 is assigned to Rochester, Washington, in Thurston 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.