Rock Island zip code
Zip code in Rock Island, WA
The location Rock Island belongs to Douglas County, state of Washington. Rock Island has been assigned with the zip code 98850.
Rock Island is the official name of the location so if you want to use the US Postal Service you must use that name.
| Zip code | Type | Population |
|---|---|---|
| 98850 | STANDARD | 1,880 |
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