ZIP CodesZIP codes in Island County, Washington
Island County, Washington has 7 ZIP codes in this list, from 98236 to 98278. They cover 6 places, among them Oak Harbor, Clinton, Coupeville and Freeland.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 98236 | Clinton | 23.0 | 47.951, -122.392 |
| 98239 | Coupeville | 31.0 | 48.219, -122.682 |
| 98249 | Freeland | 15.9 | 48.034, -122.564 |
| 98253 | Greenbank | 10.9 | 48.100, -122.576 |
| 98260 | Langley | 26.2 | 48.019, -122.453 |
| 98277 | Oak Harbor | 57.3 | 48.315, -122.637 |
| 98278 | Oak Harbor | 4.2 | 48.340, -122.669 |
The ZIP code areas of Island County add up to about 169 square miles of land (437 sq km) as the Census Bureau draws them. The largest is 98277 (Oak Harbor), with 57.3 square miles.
Places with more than one code here: Oak Harbor (2 codes).
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Clinton, WA 98236.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.