Madison SD ZIP Code
Madison city is located in South Dakota State, Lake County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Madison SD zip code by its streets and block numbers if we have some of the Madison streets loaded in our website
Madison Area Code is 605 and Time Zone is Central (GMT -06:00).
Madison Zip Code - South Dakota
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Madison City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Madison ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Madison, South Dakota.
The Madison Zip Code is 57042.
If you want to send a mail to Madison City, you should use the 57042 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Madison 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 57042 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Madison 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.