Post Offices in & near Oslo, Minnesota. Operating hours, locations, phone/fax number, services information.
Post Office in Hayfield, Minnesota on W Main St. Operating hours, phone number, services information, and other locations.
Address: 11 W Main St, Hayfield, MN 55940
Phone: 507-477-2332
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457