Mercer Island zip code
Zip code in Mercer Island, WA
The location Mercer Island belongs to King County, state of Washington. Mercer Island has been assigned with the zip code 98040.
Mercer 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 |
|---|---|---|
| 98040 | STANDARD | 25,090 |
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