Post Offices in & near Winthrop, Washington. Operating hours, locations, phone/fax number, services information.
Post Office in Winthrop, Washington on State Route 20. Operating hours, phone number, services information, and other locations.
Address: 1110 State Route 20, Winthrop, WA 98862
Phone: 509-996-2282
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
