| Official Zip Code Name | Mercer Island |
| Zip Code State | Washington |
| Primary County: | King |
| Area Code | 206 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 8 |
| Elevation Range | 16 ft. |
| Area | 6.383 Sqm. |
| Coordinates(Y,X) | 47.565229, -122.233149 |