Willis MI ZIP Code
Willis city is located in Michigan State, Washtenaw County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Willis MI zip code by its streets and block numbers if we have some of the Willis streets loaded in our website
Willis Area Code is 734 and Time Zone is Eastern (GMT -05:00).
Willis Zip Code - Michigan
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Willis City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Willis ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Willis, Michigan.
The Willis Zip Code is 48191.
If you want to send a mail to Willis City, you should use the 48191 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Willis 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 48191 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Willis 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 Michigan.