Harmon IL ZIP Code
Harmon city is located in Illinois State, Lee County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Harmon IL zip code by its streets and block numbers if we have some of the Harmon streets loaded in our website
Harmon Area Code is 815 and Time Zone is Central (GMT -06:00).
Harmon Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Harmon City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Harmon ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Harmon, Illinois.
The Harmon Zip Code is 61042.
If you want to send a mail to Harmon City, you should use the 61042 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Harmon 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 61042 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Harmon 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.