Post Offices in & near Sumas, Washington. Operating hours, locations, phone/fax number, services information.
Post Office in Sumas, Washington on Railroad Ave. Operating hours, phone number, services information, and other locations.
Address: 534 Railroad Ave, Sumas, WA 98295
Phone: 360-988-2613
Fax: 651-306-6548
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
