Winthrop IA ZIP Code
Winthrop city is located in Iowa State, Buchanan County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Winthrop IA zip code by its streets and block numbers if we have some of the Winthrop streets loaded in our website
Winthrop Area Code is 319 and Time Zone is Central (GMT -06:00).
Winthrop Zip Code - Iowa
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Winthrop City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Winthrop ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Winthrop, Iowa.
The Winthrop Zip Code is 50682.
If you want to send a mail to Winthrop City, you should use the 50682 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Winthrop ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 50682 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Winthrop city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Iowa.