Mount Vernon IL ZIP Code
Mount Vernon city is located in Illinois State, Jefferson County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Mount Vernon IL zip code by its streets and block numbers if we have some of the Mount Vernon streets loaded in our website
Mount Vernon Area Code is 618 and Time Zone is Central (GMT -06:00).
Mount Vernon Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Mount Vernon City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Mount Vernon ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Mount Vernon, Illinois.
The Mount Vernon Zip Code is 62864.
If you want to send a mail to Mount Vernon City, you should use the 62864 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Mount Vernon 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 62864 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Mount Vernon 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 Illinois.