Grotto zip code
Zip code in Grotto, WA
The location Grotto belongs to King County, state of Washington. Grotto has been assigned with the zip code 98288.
The location name Grotto is listed as unacceptable by the US Postal Service so any mailing should avoid it. Instead you can use Skykomish, the official name of the location.
| Zip code | Type | Population |
|---|---|---|
| 98288 | PO BOX | 307 |
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