ZIP Code 99180 — Usk, WA
99180 is a standard (street delivery) ZIP code serving Usk, Washington, in Pend Oreille 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 99180 at a glance
| ZIP code | 99180 |
|---|---|
| Primary city | Usk |
| State | Washington (WA) |
| County | Pend Oreille FIPS 53051 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 465 |
| Coordinates | 48.309250, -117.306630 |
How ZIP+4 works in 99180
The four digits after the hyphen encode a delivery segment inside 99180. 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 99180 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 99180.
| ZIP | City | Distance |
|---|---|---|
| 99156 | Newport, WA | 11.5 mi |
| 99119 | Cusick, WA | 13.8 mi |
| 83822 | Oldtown, ID | 17.1 mi |
| 99109 | Chewelah, WA | 18 mi |
| 83856 | Priest River, ID | 18.3 mi |
| 99148 | Loon Lake, WA | 18.5 mi |
| 99009 | Elk, WA | 19.8 mi |
| 99181 | Valley, WA | 23.9 mi |
| 83804 | Blanchard, ID | 24.2 mi |
| 99110 | Clayton, WA | 24.3 mi |
| 83841 | Laclede, ID | 25.4 mi |
| 99006 | Deer Park, WA | 26.4 mi |
Questions about 99180
What is the ZIP+4 code for 99180?
99180 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 99180, you need to look up a specific street address to get them.
What city is 99180?
99180 is assigned to Usk, Washington, in Pend Oreille 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.