| Official Zip Code Name | Winthrop |
| Zip Code State | Washington |
| Primary County: | Okanogan |
| Area Code | 509 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 8 |
| Elevation Range | 3285 ft. |
| Area | 477.982 Sqm. |
| Coordinates(Y,X) | 48.504752, -120.123756 |