ZIP Code 98239 — Coupeville, WA
98239 is a standard (street delivery) ZIP code serving Coupeville, Washington, in Island 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 98239 at a glance
| ZIP code | 98239 |
|---|---|
| Primary city | Coupeville |
| State | Washington (WA) |
| County | Island FIPS 53029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 7,656 |
| Coordinates | 48.189260, -122.657560 |
How ZIP+4 works in 98239
The four digits after the hyphen encode a delivery segment inside 98239. 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 98239 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 98239.
| ZIP | City | Distance |
|---|---|---|
| 98253 | Greenbank, WA | 8.5 mi |
| 98282 | Camano Island, WA | 8.6 mi |
| 98277 | Oak Harbor, WA | 8.9 mi |
| 98358 | Nordland, WA | 9.3 mi |
| 98278 | Oak Harbor, WA | 10.7 mi |
| 98339 | Port Hadlock, WA | 11.7 mi |
| 98249 | Freeland, WA | 13 mi |
| 98368 | Port Townsend, WA | 13.5 mi |
| 98260 | Langley, WA | 14.5 mi |
| 98292 | Stanwood, WA | 16.5 mi |
| 98325 | Chimacum, WA | 16.7 mi |
| 98257 | La Conner, WA | 17 mi |
Questions about 98239
What is the ZIP+4 code for 98239?
98239 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 98239, you need to look up a specific street address to get them.
What city is 98239?
98239 is assigned to Coupeville, Washington, in Island 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.