United States Post Office – Garretson

The United States Postal Service, also known as the Post Office, U.S. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the U.S., its insular areas, and its associated states. (Wikipedia)

Garretson and Sherman both share the same ZIP Code, 57030, and the office is located on Main Ave. in Garretson. It is full service with PO Boxes and mailing services.