Erwin SD ZIP Code
Erwin 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 Erwin SD zip code by its streets and block numbers if we have some of the Erwin streets loaded in our website
Erwin Area Code is 605 and Time Zone is Central (GMT -06:00).
Erwin Zip Code - South Dakota
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Erwin City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Erwin ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Erwin, South Dakota.
The Erwin Zip Code is 57233.
If you want to send a mail to Erwin City, you should use the 57233 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Erwin 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 57233 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Erwin 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.