Mercer Island, WA
ZIP Codes in Mercer Island, Washington
January 21, 2026
| ZIP Code | Population | Coordinates |
|---|---|---|
| 98040 | 25,464 | 47.5640, -122.2312 |
Mercer Island has 1 ZIP code
ZIP Codes in Mercer Island, Washington
January 21, 2026
| ZIP Code | Population | Coordinates |
|---|---|---|
| 98040 | 25,464 | 47.5640, -122.2312 |