Johnston City IL ZIP Code
Johnston City city is located in Illinois State, Williamson County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Johnston City IL zip code by its streets and block numbers if we have some of the Johnston City streets loaded in our website
Johnston City Area Code is 618 and Time Zone is Central (GMT -06:00).
Johnston City Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Johnston City City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Johnston City ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Johnston City, Illinois.
The Johnston City Zip Code is 62951.
If you want to send a mail to Johnston City City, you should use the 62951 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Johnston City 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 62951 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Johnston City 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.