Post Offices in & near Mount Vernon, South Dakota. Operating hours, locations, phone/fax number, services information.
Post Office in Mount Vernon, South Dakota on S Main St. Operating hours, phone number, services information, and other locations.
Address: 115 S Main St, Mount Vernon, SD 57363
Phone: 605-236-5367
Fax: 605-357-4906
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
