| Official Zip Code Name | Union |
| Zip Code State | Washington |
| Primary County: | Mason |
| Area Code | 360/564 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 8 |
| Elevation Range | 387 ft. |
| Area | 17.678 Sqm. |
| Coordinates(Y,X) | 47.327497, -123.072103 |