Yankton SD ZIP Code
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Yankton city is located in South Dakota State, Yankton County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Yankton SD zip code by its streets and block numbers if we have some of the Yankton streets loaded in our website
Yankton Area Code is 605 and Time Zone is Central (GMT -06:00).
Yankton Zip Code - South Dakota
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Yankton City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Yankton ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Yankton, South Dakota.
The Yankton Zip Code is 57078.
If you want to send a mail to Yankton City, you should use the 57078 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Yankton 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 57078 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Yankton 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 South Dakota.