
Winthrop
- County:
- Okanogan County
- County Seat:
- No
- Area (mi²):
- 0.963
- State:
- Washington
Winthrop is a town located in Okanogan County, Washington. Winthrop has a 2025 population of 626. Winthrop is currently growing at a rate of 3.99% annually and its population has increased by 23.72% since the most recent census, which recorded a population of 506 in 2020.
The average household income in Winthrop is $91,550 with a poverty rate of 3.52%. The median age in Winthrop is 37.8 years: 37.4 years for males, and 39.3 years for females.