Oak Harbor zipcode
| City | Oak Harbor |
| ZIP Code | 98278 |
| Type | Company/Organization |
| State Code | WA |
| State | Washington |
ZIP code of Oak Harbor is 98278. This place is located in Washington state in US. To send any postal service to Oak Harbor, you must use 98278 zipcode.
The ZIP code 98278 is also used with 2 more city names of Washington.
- Nas Whidbey, WA
- Whidbey Island Naval Air, WA
You should avoid following 2 city names of Washington to be used with the ZIP code 98278.
- Naval Air Station, WA
- Whidbey Nas, WA