De Smet SD ZIP Code
De Smet city is located in South Dakota State, Kingsbury County and has a unique zip code assigned by the US Postal Service Office.
You can search for the De Smet SD zip code by its streets and block numbers if we have some of the De Smet streets loaded in our website
De Smet Area Code is 605 and Time Zone is Central (GMT -06:00).
De Smet Zip Code - South Dakota
The US ZIP Code basic format consists of five decimal numerical digits assigned to the De Smet City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the De Smet ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in De Smet, South Dakota.
The De Smet Zip Code is 57231.
If you want to send a mail to De Smet City, you should use the 57231 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded De Smet 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 57231 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a De Smet 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.